Re: steps needed to call DeviceIoControl - C / C++ / MFC Discussion Boards

Bob Ciora22-Aug-05 6:36

22-Aug-05 6:36

This can be done automatically using Visual Studio. If you look at the Properties for any of the "standard" toolbar buttons generated for a blank project (SDI or MDI), check out the "Prompt" line at the very bottom of this dialog. There will be 2 strings, separated by a newline character. The first string will be displayed in the status bar, while the second will be used as the popup tooltip text (what you're looking for).

For example, the standard ID_FILE_SAVE button's Prompt string reads "Save the active document\nSave". "Save the active document" is displayed on the status bar while hovering over this button, while "Save" is displayed as the tooltip text while hovering.

Note that this prompt string also affects any menu items that use the same ID. Only the first of the Prompt strings is used, however, to fill in the status bar.

To get the tooltips for your buttons, just edit the Prompt string under the button's Properties.

Hope this helps.

Bob Ciora

Re: tooltips for bitmaps?

Bob Ciora22-Aug-05 6:37

Bob Ciora

22-Aug-05 6:37

I should mention also that this Prompt string information is also saved to your application's String Table under the ID of the command itself.

Bob Ciora

Re: tooltips for bitmaps?

Hamed Musavi22-Aug-05 10:20

Hamed Musavi

22-Aug-05 10:20

Dear Mr. Bob
Hi,

Your answer is elegant but not for his question perhaps, he asked:

I have bitmaps created on my dialog box....

Will somebody guide me how to use CToolTipCtrl [NOT CToolbar]class.In that there is AddTool () ...

steps needed to call DeviceIoControl

gamitech22-Aug-05 5:05

gamitech

22-Aug-05 5:05

Hello,
I have designed a simple device driver that export with the help of IOCTL's some variables.
I made a win 32 api that load the driver, and looks up an event in the driver.
The event works just fine it signales everytime it should, but whenever I call DeviceIoControl and then I call GetLastError(), FormatMessage() I see that the error mesage is always the same: "The parameter is incorrect" . I don't know what parameter, bacause I have checked all parameters and they are all correct.
Maybe I have missed something before calling DeviceIoControl function.
These are the steps I considered:
OpenSCManager();
CreateService(); if service already running OpenService()
StartService();
CreateFile(); //get the driver's handle
OpenEvent(); //get the event handle created by the driver;
DeviceIoControl(); //and I get the error
and then it is not important because it is not related to;
Please tell me what can be wrong. the IOCTL -> CTLCODE are the same in the driver as in the aplication.
I don't see what can I miss.
If you want I can give you a code snippet.
Thanks

gabby

Re: steps needed to call DeviceIoControl

David Crow22-Aug-05 5:12

David Crow

22-Aug-05 5:12

How are you calling DeviceIoControl()?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: steps needed to call DeviceIoControl

gamitech22-Aug-05 10:01

gamitech

22-Aug-05 10:01

int st=DeviceIoControl(hDrv,
IOCTL_PROCOBSRV_ACTIVATE_MONITORING,
&activateInfo,
sizeof(activateInfo),
NULL,
0,
&ret,
NULL
);

gabby

Re: steps needed to call DeviceIoControl

David Crow22-Aug-05 10:32

David Crow

22-Aug-05 10:32

Is this article of any help? It uses that same control code.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: steps needed to call DeviceIoControl

gamitech22-Aug-05 10:46

gamitech

22-Aug-05 10:46

hope this is good

<br />
#include "stdafx.h"<br />
#include <windows.h><br />
#include <stdio.h><br />
#include <psapi.h><br />
#include <conio.h><br />
<br />
#pragma comment (lib,"psapi.lib")<br />
LPCTSTR GetDriverFromFilePath(LPTSTR FilePath, LPTSTR DriverName);<br />
LPCTSTR ErrorMessage(DWORD ErrorId);<br />
typedef struct _ActivateInfo<br />
{<br />
    BOOLEAN  bActivate;<br />
} ACTIVATE_INFO, *PACTIVATE_INFO;<br />
<br />
typedef struct _CallbackInfo<br />
{<br />
    HANDLE  hParentId;<br />
    HANDLE  hProcessId;<br />
    BOOLEAN bCreate;<br />
}CALLBACK_INFO, *PCALLBACK_INFO;<br />
<br />
DWORD WINAPI Opreste(LPVOID pParam);<br />
<br />
HANDLE kmev;<br />
bool out;<br />
#define FILE_DEVICE_UNKNOWN             0x00000022<br />
#define IOCTL_UNKNOWN_BASE              FILE_DEVICE_UNKNOWN<br />
#define IOCTL_PROCOBSRV_ACTIVATE_MONITORING    \<br />
	CTL_CODE(IOCTL_UNKNOWN_BASE, 0x0800, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)<br />
#define IOCTL_PROCOBSRV_GET_PROCINFO    \<br />
	CTL_CODE(IOCTL_UNKNOWN_BASE, 0x0801, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)<br />
<br />
/*********************************************************<br />
 *   Main Function Entry<br />
 *<br />
 *********************************************************/<br />
int _cdecl main(void)<br />
{<br />
			<br />
	<br />
	<br />
WIN32_FIND_DATA fd;<br />
<br />
	SC_HANDLE hSCManager;<br />
    SC_HANDLE hService;<br />
<br />
					<br />
<br />
FindFirstFile("*.sys",&fd);<br />
char path[1024];<br />
GetModuleFileName(0,path,sizeof(path));<br />
MessageBox(0,ErrorMessage(GetLastError()),"GetModuleFileName",MB_ICONINFORMATION);<br />
char DriverName[1024];<br />
strcpy(DriverName,GetDriverFromFilePath(path,fd.cFileName));<br />
<br />
    hSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);<br />
 MessageBox(0,ErrorMessage(GetLastError()),"OpenSCManager",MB_ICONINFORMATION);<br />
    printf("Load Driver\n");<br />
<br />
    if(hSCManager!=NULL)<br />
    {<br />
<br />
        printf("Create Service\n");<br />
		<br />
<br />
hService = CreateService(hSCManager,fd.cFileName,fd.cFileName,SERVICE_ALL_ACCESS,SERVICE_KERNEL_DRIVER,SERVICE_DEMAND_START,SERVICE_ERROR_NORMAL,DriverName,NULL,NULL,NULL,NULL,NULL);<br />
MessageBox(0,ErrorMessage(GetLastError()),"CreateService",MB_ICONINFORMATION);<br />
<br />
if (hService==NULL)   hService=OpenService(hSCManager, fd.cFileName,SERVICE_ALL_ACCESS);<br />
MessageBox(0,ErrorMessage(GetLastError()),"OpenService",MB_ICONINFORMATION);<br />
printf("Start Service\n");<br />
<br />
    if(StartService(hService, 0, NULL)==0)<br />
		   {<br />
MessageBox(0,ErrorMessage(GetLastError()),"Start Service",MB_ICONINFORMATION);<br />
DeleteService(hService);<br />
CloseServiceHandle(hService);<br />
<br />
		   }<br />
		   else<br />
		   {<br />
			   <br />
	SERVICE_STATUS ss;<br />
	while (1)<br />
	{<br />
QueryServiceStatus(hService,&ss);<br />
if (ss.dwCurrentState!=SERVICE_RUNNING)<br />
{<br />
if (ss.dwWaitHint<1000) Sleep(1000);<br />
else <br />
if (ss.dwWaitHint>10000) Sleep(10000);<br />
else Sleep(ss.dwWaitHint);<br />
<br />
}<br />
else<br />
goto out;<br />
<br />
}<br />
<br />
<br />
<br />
		   }<br />
	}<br />
	  <br />
out:<br />
	<br />
MessageBox(NULL,"Service running","",MB_OK);<br />
<br />
<br />
DWORD ret;<br />
HANDLE hDrv;<br />
char pth[1024];<br />
char DrvPath[1024];<br />
<br />
GetModuleFileName(GetModuleHandle(0),pth,sizeof(pth));<br />
<br />
strcpy(DrvPath,GetDriverFromFilePath(pth,fd.cFileName));<br />
MessageBox(0,DrvPath,"",MB_OK);<br />
<br />
<br />
hDrv=CreateFile(DrvPath,<br />
				   GENERIC_READ | GENERIC_WRITE,<br />
				   FILE_SHARE_READ | FILE_SHARE_WRITE,<br />
				   0,<br />
				   OPEN_EXISTING,<br />
				   FILE_FLAG_OVERLAPPED,<br />
				   0);<br />
MessageBox(0,ErrorMessage(GetLastError()),"CreateFile",MB_ICONINFORMATION);<br />
<br />
<br />
out=false;<br />
CALLBACK_INFO call;<br />
ACTIVATE_INFO activateInfo;<br />
activateInfo.bActivate=TRUE;<br />
bool active=false;<br />
CreateThread(0,0,Opreste,0,0,0);<br />
<br />
<br />
kmev=OpenEvent(SYNCHRONIZE,FALSE,"ProcObsrvProcessEvent");<br />
MessageBox(0,ErrorMessage(GetLastError()),"OpenEvent kmev",MB_ICONINFORMATION);<br />
int st=DeviceIoControl(hDrv,<br />
					   IOCTL_PROCOBSRV_ACTIVATE_MONITORING,<br />
					   &activateInfo,<br />
					   sizeof(activateInfo),<br />
					   NULL,<br />
					   0,<br />
					   &ret,<br />
					   NULL<br />
					   );<br />
<br />
MessageBox(0,ErrorMessage(GetLastError()),"DeviceIoControl",MB_ICONINFORMATION);<br />
<br />
<br />
<br />
<br />
<br />
       while(!kbhit())<br />
	   {<br />
		   call.hProcessId=NULL;<br />
		   if (kmev==0) MessageBox(0,"Wait Failed: kmev==0","",MB_OK);<br />
<br />
		   if(WaitForSingleObject(kmev,INFINITE)==WAIT_FAILED)<br />
			   MessageBox(0,"Wait Failed=Wait","",MB_OK);<br />
		   OVERLAPPED ov          = { 0 };<br />
		   ov.hEvent=CreateEvent(0,1,0,0);<br />
<br />
	int stat;<br />
	stat=DeviceIoControl(hDrv,<br />
		IOCTL_PROCOBSRV_GET_PROCINFO,<br />
		0,<br />
		0,<br />
		&call,<br />
		sizeof(call),<br />
		&ret,<br />
		0);<br />
MessageBox(0,ErrorMessage(GetLastError()),"DeviceIoControl",MB_ICONINFORMATION);<br />
	/*if (stat!=0)<br />
	{<br />
	GetOverlappedResult(<br />
		hDrv,<br />
		&ov,<br />
		&ret,<br />
		TRUE);<br />
	MessageBox(0,ErrorMessage(GetLastError()),"GetOverLappedResult",MB_ICONINFORMATION);<br />
	}<br />
	*/<br />
	<br />
<br />
<br />
<br />
if (call.hProcessId!=NULL)<br />
{<br />
DWORD need;<br />
HMODULE mods[1000];<br />
char nume[1024];<br />
<br />
	EnumProcessModules(OpenProcess(PROCESS_ALL_ACCESS,FALSE,(DWORD)call.hProcessId),mods,sizeof(mods),&need);<br />
	GetModuleFileName(mods[0],nume,sizeof(nume));<br />
	if(call.bCreate==TRUE)<br />
	MessageBox(NULL,nume,"Process Created",MB_OK);<br />
	else<br />
		MessageBox(NULL,nume,"Process Terminated",MB_OK);<br />
}<br />
	CloseHandle(ov.hEvent);<br />
	Sleep(100);<br />
	   }<br />
<br />
getch();<br />
printf("%s","Unloading driver");<br />
ACTIVATE_INFO ac;<br />
	   ac.bActivate=FALSE;<br />
DeviceIoControl(hDrv,IOCTL_PROCOBSRV_ACTIVATE_MONITORING,&ac,sizeof(ac),NULL, 0,&ret,NULL);<br />
MessageBox(0,ErrorMessage(GetLastError()),"DeviceIoControl",MB_ICONINFORMATION);<br />
ControlService(hService,SERVICE_CONTROL_STOP,0);<br />
DeleteService(hService);<br />
<br />
    <br />
    return 0;<br />
}<br />
<br />
DWORD WINAPI Opreste(LPVOID pParam)<br />
{<br />
	bool x;<br />
	x=false;<br />
	while(x==false)<br />
	{<br />
	if(GetAsyncKeyState(VK_ESCAPE)<0)<br />
		{<br />
			<br />
	x=true;<br />
	out=true;<br />
		}<br />
		Sleep(1);<br />
	}<br />
<br />
_exit(0);<br />
ExitThread(0);<br />
return 0;<br />
}<br />
<br />
<br />
<br />
LPCTSTR GetDriverFromFilePath(LPTSTR FilePath, LPTSTR DriverName)<br />
{<br />
char file[1024];<br />
char file1[1024];<br />
strcpy(file,_strrev(FilePath));<br />
char slesh[2]={'\\','\0'};<br />
<br />
<br />
for (int i=0; i<=strlen(file); i++)<br />
{<br />
	char fl[2]={'\0','\0'};<br />
<br />
	fl[0]=file[i];<br />
	fl[1]='\0';<br />
if (strcmp(fl,slesh)==0) break;<br />
<br />
}<br />
<br />
strcpy(file1,_strrev(file));<br />
file1[strlen(file1)-i]='\0';<br />
strcat(file1,DriverName);<br />
<br />
return file1;<br />
}<br />
LPCTSTR ErrorMessage(DWORD ErrorId)<br />
{<br />
<br />
LPVOID lpMsgBuf;<br />
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |FORMAT_MESSAGE_FROM_SYSTEM |FORMAT_MESSAGE_IGNORE_INSERTS,<br />
			  NULL,<br />
			  ErrorId,<br />
			  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),<br />
			  (LPTSTR) &lpMsgBuf,<br />
			  0,<br />
			  NULL<br />
			  );<br />
<br />
return LPCTSTR(lpMsgBuf);<br />
<br />
}<br />

gabby

http attachment

ppp00122-Aug-05 5:02

ppp001

22-Aug-05 5:02

Hi all,

I am writing a http server and client in order to pass binary data(image) from client to server. And can I transmit the binary data in binary format in the http protocol as payload, without doing base64 encoding for the binary data ?

Thanks

CListCtrl HotItem colour

Janette22-Aug-05 4:19

Janette

22-Aug-05 4:19

Hi,

Does anyone know how to change the colour of the HotItem-colour,
my problem is that the item set hot at the moment is dark blue and is not easily noticed next to the other items that are black. I would rather set it yellow or something instead.

Thanks in advance,

Janette

Supress the FileDownload Dialog in Internet Explorer

G.Radhakrishna22-Aug-05 3:18

G.Radhakrishna

22-Aug-05 3:18

In my project i have inserted a WebBrowser ActiveX Control.

I want to supress the FileDownload dialog...

Windows Error Message Handler

nripun22-Aug-05 2:41

nripun

22-Aug-05 2:41

How do i detect the common Windows Error Dialog message has occured, the one with the Send Error Report / Dont Send.

Re: Windows Error Message Handler

Cedric Moonen22-Aug-05 3:11

Cedric Moonen

22-Aug-05 3:11

This message is shown when your program has raised an unhandled exception. So, when you have section of your code that could possibly throw an exception, you can encapsulate it into a try-catch block.

Re: Windows Error Message Handler

nripun22-Aug-05 3:20

nripun

22-Aug-05 3:20

I want to monitor the error caused by another program not written by me. In case it causes an exception i want my program which is monitoring for such exceptions to close it. Smile | :)

i am kinda lazy.

Re: Windows Error Message Handler

Blake Miller22-Aug-05 5:58

Blake Miller

22-Aug-05 5:58

Your program can be written to act like a debugger and catch the exceptions generated by the other program.
Otherwise, if your piece of code can get injected into the other program, such as they will load a DLL you wrote, then you can investigate this funtion: SetUnhandledExceptionFilter

Load application as view

Geert van Horrik22-Aug-05 2:41

Geert van Horrik

22-Aug-05 2:41

Hi all,

I want to know if it is possible (if anyone ever tried this) to load an application into my application. This means, I have a dialog. I want to load the other application INSIDE my dialog (so no 2nd taskbar icon, no border for the window).

I am currently launching other applications and setting their size. However, when the user switches back to my application, my application get's the focus and will jump to the front. If I just show the application inside my application, it will always have to focus.

thanks!

Geert

Want to spread the newest version of your software automatically for free? Use Updater!
Visit my website: www.gvhsoftware.org

Re: Load application as view

C^hris L^osinger22-Aug-05 4:12

C^hris L^osinger

22-Aug-05 4:12

it's possible if the other application is designed to allow that. and if it is, it will probably do that via COM/OLE.

Cleek | Image Toolkits | Thumbnail maker

Re: Load application as view

Geert van Horrik22-Aug-05 4:47

Geert van Horrik

22-Aug-05 4:47

mmmm.... Too bad.

Thanks for your help though!

Geert

Want to spread the newest version of your software automatically for free? Use Updater!
Visit my website: www.gvhsoftware.org

subclass all

johny_d22-Aug-05 2:33

johny_d

22-Aug-05 2:33

does anyone know how to subclass all controls of a specific type in a window? what i mean is the window style just like corel draw 9. everything including the CFileDialog and the print dialogs has the same style - same buttons, edit boxes,etc (i dont believe they subclassed each control separately)

Live long and in prosper

johny74656@gmail.com

Re: subclass all

Blake Miller22-Aug-05 6:29

Blake Miller

22-Aug-05 6:29

The subclassing of a window can occur per window instance or for the entire class, meaning for the entire process.

So, if you want to subclass all windows for a single dialog, you need to subclass each instance of a child control window separately. You replace the window procedure for the window's instance. -> SetWindowLong(hWnd, GWL_WNDPROC, ... );

If you want all child windows to be modified for the entire application, then you can subclass the window procedure globally by replacing the window class's window procedure with your own code. -> SetClassLongPtr(hWnd, GCLP_WNDPROC, ... );

graying/ungrayin not working?

sayup22-Aug-05 1:42

sayup

22-Aug-05 1:42

hello,
can somebody tell me how to write code for graying/ungraying of menu items?I have written following code but its not working:
HWND hwnd;
EnableMenuItem(GetMenu(hwnd), ID_GRAPHDISPLAY_CHANNEL1, MF_DISABLED| MF_GRAYED );
It gives error that GetMenu() doesnt take one parameter.
why?
please guide

thanks

Re: graying/ungrayin not working?

Rage22-Aug-05 1:45

Rage

22-Aug-05 1:45

Try this:

Mike's C++ FAQ[^]

Hope this helps

~RaGE();

Re: graying/ungrayin not working?

sayup22-Aug-05 3:59

sayup

22-Aug-05 3:59

hello,
this is not working.What i want is that when i close my child modeless dialog box the grayed menu item should be enabled.So in OnClose handler i am writing code for enabling menu item.But its not working.I have created an object of class CMenu and using function EnableMenuItem() as follows
CMenu mymenu;
mymenu.EnableMenuItem(ID_MENU_CHANNEL1,MF_ENABLED);
this is not working
plz help

thanks

Re: graying/ungrayin not working?

Rage22-Aug-05 5:58

Rage

22-Aug-05 5:58

sayup wrote:
when i close my child modeless dialog box the grayed menu item

Which menu item ? From which menu ?

sayup wrote:
CMenu mymenu;
mymenu.EnableMenuItem(ID_MENU_CHANNEL1,MF_ENABLED);

Is this because your CMenu is a local variable that you destroy immediately after leaving the function in which you have created it ? Post more code, plz.

~RaGE();

Re: graying/ungrayin not working?

Bob Ciora22-Aug-05 6:53

Bob Ciora

22-Aug-05 6:53

You may have more luck taking over the UPDATE_COMMAND_UI function for that menu item. This is a pretty simple process, and doesn't require that the modeless child dialog know anything about the parent, or have to send some sort of signal to indicate that it's been hidden or unhidden. The UPDATE_COMMAND_UI handlers get fired whenever that menu item is about to be displayed.

I'm going to assume that you have a View menu with your various modeless sub-dialogs represented within this menu. In this case, I'm going to further assume that you have a command ID assigned for each dialog. For example, you may have IDC_VIEW_MYCHILD as the ID for the menu command to toggle show/hide some child dialog.

Using ClassWizard on the parent window/frame/etc., find the IDC_VIEW_MYCHILD command in the left hand pane. In the right hand pane, you'll then see entries for COMMAND and UPDATE_COMMAND_UI. Double-click the UPDATE_COMMAND_UI to create an Update handler for that menu item, and go edit that code.

Like I said, MFC will call the UPDATE handler for each menu item as it's getting ready to display the menu. This allows the user to customize each menu item separately via the UPDATE handler for that item.

In your case, using the codes above, you'd end up with a new function along the lines of CMyFrame::OnUpdateViewMychild. This function will receive a pointer to a CCmdUI object. CCmdUI has a lot of features, but for your purposes, you'd only need the Enable() method. If you have a pointer to the modeless dialog, then you can simply Enable or Disable the menu item based on the visibility status of the dialog, as such:

void CMyFrame::OnUpdateViewMychild(CCmdUI * pCmdUI)
{
    // Assumed m_pMyChild is the pointer to the modeless dialog:
    pCmdUI->Enable(!m_pMyChild->IsWindowVisible());
}

This code will enable (ungray) the menu item if the window is not visible, or disable (gray) the menu item if the window IS visible.

By using the UPDATE_COMMAND_UI handlers, you don't have to have the modeless child do any kind of mucking about with the main application menus or anything like that. This keeps them independent, and is a lot cleaner. In addition, one simple line of code takes care of your problem.

Hope this helps (and I hope I didn't "assume" too much Smile | :)

)

Bob Ciora

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.