C / C++ / MFC

Checking if VisualStudio is installed

26-Aug-02 1:00

You'll have to handle WM_CREATE and use ModifyStyle to add WS_MINIMIZEBOX style.

Tomasz Sowinski -- http://www.shooltz.com

"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.

silverspoon25-Aug-02 22:55

silverspoon

25-Aug-02 22:55

I'm writing a Software which generates C-Code. This kind of Generator works calls during runtime msdev from command line to test the generated source-code. This works perfectly if VisualStudio is installed on a system but actually if this peace of generator is installed onto an other system I have to check if visual studio is installed. Does anybody know how to check if Visual Studio itself is installed on a system (checking with vc++ code) and how to get the binary-directory of vc?

thanks a lot in advance.
flo

I don't want achieve immortality through my work - I want achieve it through not dying - Woody Allen

Pavel Klocek25-Aug-02 23:07

Pavel Klocek

25-Aug-02 23:07

Search the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\6.0\InstallDir for VisualStudio 6.0.

Sonork 100.15206;PavelK

silverspoon25-Aug-02 23:14

silverspoon

25-Aug-02 23:14

thanks a lot - if you have a ready made class to perform registry readouts please let me know!
thank you

I don't want achieve immortality through my work - I want achieve it through not dying - Woody Allen

Pavel Klocek26-Aug-02 4:44

Pavel Klocek

26-Aug-02 4:44

Try to search the CodeProject Wink | ;)

.

Sonork 100.15206;PavelK

silverspoon28-Aug-02 4:28

silverspoon

28-Aug-02 4:28

thank you - sorry for that - thought it would be more problematic to get an answer. Smile | :)

I don't want achieve immortality through my work - I want achieve it through not dying - Woody Allen

Thumbsize calculation MATH problems

Dudi Avramov26-Aug-02 20:57

Dudi Avramov

26-Aug-02 20:57

Use CRegKey in <atlbase.h> .
You can find it in MSDN

alex.barylski25-Aug-02 22:46

25-Aug-02 22:46

I have for about 8 hours tried to figure out what the hell is wrong with my code or math and I have reached the point where the computer is going to end up outside for the night so i've given up on it and moved on to something else.

Anyways...this this snippet of code is pretty basic math so I hope someone can tell me where i'm going wrong... Cry | :((

before I go nutts...

UINT CTimelineCtrl::CalcThumbSize(UINT nVirtualWidth, UINT nVisibleWidth)
{
	// Thumb size not needed, scroll bar should be invisible
	if(nVirtualWidth <= nVisibleWidth) return -1;
	
	float temp = ((float)nVisibleWidth / (float)nVirtualWidth) * (float)nVirtualWidth;

	return nVirtualWidth - (nVirtualWidth - percentVisible);
}

The number returned is just passed to a SCROLLINFO structure and then to SetScorllPos()

Can someone please help me with this...the math part mostly but maybe i'm not understanding the nPage property or something...

if the nMax is 100 and nPage is 100 also...the thumb size is 100% meaning no scrolling can occur...I thought it was pretty self explanatory...

Help me please before I go insane... Poke tongue | ;-P

Thanx

cheers

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Tomasz Sowinski25-Aug-02 23:17

25-Aug-02 23:17

Hockey wrote:
return nVirtualWidth - (nVirtualWidth - percentVisible);

You're actually returning percentVisible here. Is that what you want to achieve?

Tomasz Sowinski -- http://www.shooltz.com

"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.

alex.barylski26-Aug-02 10:51

26-Aug-02 10:51

I'm trying to calculate and return the value needed to display proportional thumbs inside scrollbars...

The function takes as arguments
1) The virtual size of the window or DC
2) The visible size of the client area

I think these are the only parameters needed to calculate the thumb size...???

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Dominik Reichl26-Aug-02 1:44

Dominik Reichl

26-Aug-02 1:44

Just a few things i want to say about your posted code:

1) The first line inside the function reads:

if(nVirtualWidth <= nVisibleWidth) return -1;

But the declaration of the function is UINT, so it will return 0xFFFFFFFF. I assume you know this.

2) Second line inside the function:

float temp = ((float)nVisibleWidth / (float)nVirtualWidth) * (float)nVirtualWidth;

This long line does nothing other than:

float temp = (float)nVisibleWidth;

You first divide and then multiply the result with the same value you divided with?

3) Third and last line:

return nVirtualWidth - (nVirtualWidth - percentVisible);

For this you can simply write:

return percentVisible);<br />
<br />
This code seems to be improvable ;)<br />
<br />
:-D<br />
-Dominik

alex.barylski26-Aug-02 10:55

WM_DROPFILES vs IDropTarget

26-Aug-02 10:55

Dominik Reichl wrote:
) The first line inside the function reads:

if(nVirtualWidth <= nVisibleWidth) return -1;

Thank you...I was wondering the scroll bars were hiding themselves automatically...I totally missed that one. Blush | :O

What can I say I hate math so very much...

What steps are required then in calculating the proportional thumbsize of a scrollbar...

I supply the function

1) The virtual width
2) The visible width of client

these two variables should be more than enough to calculate the thumb size no...?

Thanx

cheers Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

CaesarCZ25-Aug-02 22:48

CaesarCZ

25-Aug-02 22:48

Hi,
I wrote a WinAPI (no MFC) app that implements IDropSource and all neccessary interfaces. I needed my app to support drag & drop. But I stuck with the WM_DROPFILES for the target, because it's way easier. But now, I'd need to accept both MOVE and COPY drops. As it seems WM_DROPFILES can't handle this (if it can, tell me!!), I'll need to do the IDropTarget interface implementation. Anybody could post some sourced to guide me? I know that I'd never write the IDropSource without the MSDN source, but I cannot find any on IDropTarget. Thanks

Problem with multiple acitvex instances on Win9x

KaЯl25-Aug-02 21:42

KaЯl

25-Aug-02 21:42

I'm trying to have several instances of the same activeX embedded in a container application. This activeX is quiet complex, using message queues and graphic displays. If there's no problem on Win2000, NT or XP, the container application crashes on Win95/98/ME when it instantiates the second instance of the integrated ActiveX.
Does anybody have a clue what's happening ? (TIA)

We do not inherit the Earth from our ancestors. We borrow it from our children.

Antoine de Saint Exupéry (1900-1944)

CreateProcess

Anonymous25-Aug-02 21:43

Anonymous

25-Aug-02 21:43

I am executing my own vc++ exe in VB program using CreateProcessFunction.That vc++exe has one window.When iam working on my vc++ window, I should not allow the person to interact with VB form window.He has to start interact only when i close the vc++ exe.How to do this.

Re: CreateProcess

Tomasz Sowinski25-Aug-02 23:24

How I can get listview's item text of other application?

25-Aug-02 23:24

Can you disable windows in VB? Something like DisableMyFormRightNowPlz function?

Tomasz Sowinski -- http://www.shooltz.com

"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.

Re: CreateProcess

Daniel Turini26-Aug-02 0:35

Daniel Turini

26-Aug-02 0:35

Try calling WaitForSingleObject with the VC's process handle

Concussus surgo.
When struck I rise.

mmlxl25-Aug-02 16:06

mmlxl

25-Aug-02 16:06

It must use hook?who can introduce the easy way?

Hi

Re: How I can get listview's item text of other application?

alex.barylski25-Aug-02 23:03

Re: How I can get listview's item text of other application?

25-Aug-02 23:03

I'm thinking you could:

Use FindWindow() to find the parent window in which you listview/ctrl resides. Iterate the the child windows using GetWindow() and stop when you find the window whose class is "SysListView32" or "msctrls32" or whatever...actually use SPY++ first to determine the class name, cuz i'm unsure...

Once you have the handle to that listview window attach it to an CListCtrl object and goe nutts...extracting items just like you normally would...

cheers Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

It can't work!

mmlxl25-Aug-02 23:21

mmlxl

25-Aug-02 23:21

I have tried it.But it don't work.I think it maybe use pointers and other application can't access your pointer.

Hi

Tomasz Sowinski25-Aug-02 23:34

Re: How I can get listview's item text of other application?

25-Aug-02 23:34

http://www.microsoft.com/msj/defaultframe.asp?page=/msj/0997/win320997.htm[^]

Tomasz Sowinski -- http://www.shooltz.com

"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.

mmlxl26-Aug-02 21:37

mmlxl

26-Aug-02 21:37

Thanks!It works.
Can't I ask you another question?
I also want to get the item RECT.I use ListView_GetItemRect() in the
same way,but when run it report memory violation.I think it maybe
use other parameter.How can I do it?
Thanks again!

Hi

Is it possible to...

Abin25-Aug-02 15:24

Abin

25-Aug-02 15:24

Is it possible to send WM_KEYDOWN message to a window that is currently minimized, and the window reacts just as if the user presses the key on it?

Re: Is it possible to...

alex.barylski25-Aug-02 22:56