interesting problem - C / C++ / MFC Discussion Boards

Alex H 19838-Jan-03 10:42

Alex H 1983

8-Jan-03 10:42

void CMyDialog::OnBnClickedButton1() {
CTestView *e=new CTestView();
e->SendMessage(WM_MBUTTONUP, 0, 0);
}

it's not work Cry | :((

what can i do ?

Re: Debug Assertion Falied !! :((((

l a u r e n8-Jan-03 10:48

l a u r e n

8-Jan-03 10:48

no no no
define some custom message id's (see msn) and send a custom message to ur app class and add a handler there for the message

"traffic lights are for people who can't make their own decisions"
biz stuff about me

Quick question..

Subrahmanyam8-Jan-03 8:38

Subrahmanyam

8-Jan-03 8:38

What event (or message or function call) does my MFC application/dialog will get when user presses WINDOWS-KEY + M ( the one that we use to minimize all windows ).

My Dialog based application does not get any notification and doesn't get minimized when I press WINDOWS-KEY+M

however I am able to minimize all windows (including my app) by pressing the "Show Desktop" quick link (which generally resides next to Start menu in the taskbar)

I want to rectify this problem with my app.

Please help me.

Re: Quick question..

l a u r e n8-Jan-03 8:52

l a u r e n

8-Jan-03 8:52

ummmmm isnt it the WM_SHOWWINDOW message?

"traffic lights are for people who can't make their own decisions"
biz stuff about me

Re: Quick question..

Subrahmanyam8-Jan-03 9:20

Subrahmanyam

8-Jan-03 9:20

Wizard window says
WM_SHOWWINDOW: Indicates a window is about to be hidden or shown

So WM_SHOWWINDOW is when we call ShowWindow(nShowCmd) or any other similar things.

I am asking about window minimize.

I have done a weird thing for the window not to get minimized by default (ie without adding any code).
I removed the minimize button & title bar of the dialog. Poke tongue | ;-P

Since I am doing all that title bar stuff on my own, I want to add this functionality too.

Please help me.

Re: Quick question..

l a u r e n8-Jan-03 10:31

l a u r e n

8-Jan-03 10:31

afaik all window stuff to do with min and max and whatnot gets done thru the SW_SHOWWINDOW message

"traffic lights are for people who can't make their own decisions"
biz stuff about me

Re: Quick question..

Alvaro Mendez8-Jan-03 11:04

Alvaro Mendez

8-Jan-03 11:04

For message related issues, the best tool to use is Spy++, which comes with Visual C++. I just tried it and I got a message number 0x0127 (unknown) for Windows+M. You may wanna look into it further.

One thing to note however, is that Windows+M works fine with a dialog-based app I have here. Is there something special about yours?

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

interesting problem

Sunnygirl8-Jan-03 8:03

Sunnygirl

8-Jan-03 8:03

hello @all,

i need an instruction which waits until MATLAB will finish it's job.

earlier forum question:

hello @all,

i try to explain what i want / must do :

i have something like this:

i=0; while(i<5) { // reading out a com // get datasets and process them // send the processed datasets to MATLAB to get a diagram // the diagram is seen in my mfc-program (but came from matlab) i++; } 

the only problem is the while loop. without these, the program part runs perfectly. however i need a while loop or something like that.

i think, the problem lie in the fact that the program sends the data to matlab and then directly in the code continues to go. possibly different processes run off parallel.

i think i must have something that waits so long, till matlab is ready with the diagram (i tried Sleep(1000) but it do not work).
maybe somebody know, if matlab has got a 'instruction' or if i can make something like a 'queue'.

thank you very much
happy

Re: interesting problem

jmkhael8-Jan-03 8:14

jmkhael

8-Jan-03 8:14

Donno how ure doing it but take a look at the code on
http://www.codeproject.com/com/matlabengine.asp
and http://www.mathworks.com/access/helpdesk/help/pdf_doc/matlab/apiext.pdf

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: interesting problem

Sunnygirl8-Jan-03 8:39

Sunnygirl

8-Jan-03 8:39

thanks for reply. Rose | [Rose]

cool idea with the first url.
but the second link is 'broken', or??

sunny

Re: interesting problem

Sunnygirl8-Jan-03 9:17

Sunnygirl

8-Jan-03 9:17

my error. Everything is correct. super, thank you.

Rose | [Rose]

sunny

GetCurrentDirectory vs GetModuleFileName

Bash8-Jan-03 7:41

Bash

8-Jan-03 7:41

Hi!

I develop my own application using Visual C++. I need to get a directory where my application is launched.

I've found in MSDN two function: GetCurrentDirectory and GetModuleFileName. It seems that both methods are shown the right results (except for GetModuleFileName I need to make ReverseFind the first slash - but it's not hard to do). What method is the best ?

Yours sincerely,
Alex Bash

Re: GetCurrentDirectory vs GetModuleFileName

User 66588-Jan-03 7:52

User 6658

8-Jan-03 7:52

I strongly recommend you to use GetModuleFileName, this will give you the correct result. Be careful with GetCurrentDirectory, this will return the path your app is currently working in. E.g. if you create a file in "C:\Windows", this will be the current directory, regardless of whether your app is located there or not.

regards
Greg

modified 12-Sep-18 21:01pm.

Re: GetCurrentDirectory vs GetModuleFileName

Bash8-Jan-03 8:06

Bash

8-Jan-03 8:06

At the first state of application (I don't perform any creating of files) - do GetModuleFileName and GetCurrentDirectory show the same results ?

Yours sincerely,
Alex Bash

Re: GetCurrentDirectory vs GetModuleFileName

Tim Smith8-Jan-03 8:39

Tim Smith

8-Jan-03 8:39

They can, but need not.

Example:

Create a shortcut to your program.
Modify the shortcut and specify a different directory for the working directory.
Run the program using the shortcut.

When you do this, those API routines will return two different things.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: GetCurrentDirectory vs GetModuleFileName

User 66588-Jan-03 8:40

User 6658

8-Jan-03 8:40

To be honest: I don't know. But I assume that if you call GetCurrentDirectory dierctly after startup it will return the path where your app is located. But I still think it is safer to use GetModuleFileName.

/edit: Tim is right Big Grin | :-D

regards

modified 12-Sep-18 21:01pm.

rotating transparent bitmap causes a halo of transparent color around bitmap

yoshibebe8-Jan-03 7:27

yoshibebe

8-Jan-03 7:27

When I rotate a transparent bitmap, the transparent background color will be drawn around the bitmap (a one pixel halo). This doesn't happen when the rotation is horizontal or vertical. I am doing the following masking:

BitBlt( hScreenDC, r.left, r.top, curWidth, curHeight, hMemoryDC, 0, 0, SRCINVERT );
BitBlt( hScreenDC, r.left, r.top, curWidth, curHeight, hMaskDC, 0, 0, SRCAND );
BitBlt( hScreenDC, r.left, r.top, curWidth, curHeight, hMemoryDC, 0, 0, SRCINVERT );

At this point I have no clue as to why something like this would occur, because I have rotated the whole bitmap and saved it into the DC's. Has this happened to anyone before?
Thanks!

Re: rotating transparent bitmap causes a halo of transparent color around bitmap

Christian Graus8-Jan-03 10:16

Christian Graus

8-Jan-03 10:16

Sounds like your rotation code is causing your mask to degrade, so that the transparent colour where it is next to another colour is slightly changed. Have you verified that the pixels in question are EXACTLY the background colour, and not off by one or two ?

Christian

No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not
as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Setting Focus on Property Page

Anonymous8-Jan-03 7:03

Anonymous

8-Jan-03 7:03

Can anyone tell me this?

I have a window that contains 4 to 5 property pages so the user can click on the tab on the top and change different things on each one. When the user hits OK, there are checks to validate some of the changes. If one of the validations fails, I want to go to the edit box that contains the information. But that edit box might not be on the property page the user is currently on. I have an error message saying what is invalid. But is there any way, after displaying the error message, to set the focus to the edit box on a different property page? I hope all of this is making sense.

In summary, I just want to be able to set focus on a control that might be on a different page than the one the user was on when he/she hit OK. Is there anyway to do this. Currently, it is setup using the Win32 SDK using PROPSHEETPAGE and PROPSHEETHEADER. No MFC used.

Re: Setting Focus on Property Page

Al_Pennyworth8-Jan-03 8:31

Al_Pennyworth

8-Jan-03 8:31

Try using PropSheet_SetCurSel. This function is simple to use, if you know the page handle or the index. For example, say your control is on the 3rd page out of 4 pages. The function would be:

PropSheet_SetCurSel(GetParent(hDialog), NULL, 2);

Then set the focus on your control. If you know the page and choose to use it, just replace NULL with the page handle...

anyone know this error ?

joshfl8-Jan-03 6:54

joshfl

8-Jan-03 6:54

Deleting intermediate files and output files for project 'VisiBounce - Win32 Debug'.
--------------------Configuration: VisiBounce - Win32 Debug--------------------
Compiling resources...
Compiling...
StdAfx.cpp
Compiling...
VisiBounce.cpp
VisiBounceDlg.cpp
FileInfo.cpp
Generating Code...
Linking...
VisiBounceDlg.obj : error LNK2001: unresolved external symbol _BBBOUNCECHECK@20
Debug/VisiBounce.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

VisiBounce.exe - 2 error(s), 0 warning(s)

anyone know this compilation error, and maybe can suggest what i did wrong?

todo....
:: insert inpirational text here ::

Re: anyone know this error ?

joshfl8-Jan-03 7:01

joshfl

8-Jan-03 7:01

ah hahhh, I got it , for those who want to know, it was that the compiler was not finding the Library (.lib) file for my .dll ! I dropped the .lib file in the project directory, project / settings / link -> .lib file,
0 errors, 0 warnings Wink | ;)