Need Help With Runtime Error

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I want to use a code in my MFC application that it works only in win vista and higher, because it needs a dll file that it's not in winXP.

This is my code:

C++

if ( ... ) //  check win 7 or Vista
DwmIsCompositionEnabled();

It works fine in win 7, but my problem is when I run the application in XP, in run time and before the code that checked the OS, it breaks with this error:

"This application has failed to start because dwmapi.dll was not found. Re-Installing the application may fix the problem."

Is there any idea?

Posted 13-Nov-11 21:49pm

Minoo Khazeni

Updated 13-Nov-11 22:59pm

RaisKazi

v3

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3 solutions

Solution 2

Try using the GetVersionEx()[^] function to verify the OS version. I think you will also need to modify your executable so that dwmapi is not linked in to the program but loaded dynamically once you have determined that you are on the correct OS.

Posted 13-Nov-11 23:23pm

Richard MacCutchan

Updated 13-Nov-11 23:25pm

v2

Comments

Minoo Khazeni 16-Nov-11 0:26am

Of course I'm using GetVersionEx, but for brief I used ... in the code above. I can't understand what you mean by "you will also need to modify your executable..." . please explain more.

Richard MacCutchan 16-Nov-11 3:43am

I'm not sure what more there is to explain. If this DLL does not exist on some OS versions then you need to ensure that it is not linked in to your executable file. You need to load it dynamically using the LoadLibrary() function.

Albert Holguin 10-Dec-11 9:29am

Yep, have to do it dynamically... +5... Great advice.

Solution 1

You can use WMI Query to fetch OS detials from system. the following article will help to do same.

Making WMI Queries In C++[^]

Posted 13-Nov-11 22:03pm

LaxmikantYadav

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Minoo Khazeni · Accepted Answer · 2011-12-09T18:28:00

Solution 3

It was because of "dwmapi.lib" that I put in Additional Dependencies. When I run the application in Win XP, it wants to find "dwmapi.lib" as the first step, so it breaks.
Now I used another way:

C#

if ( ... ) //  check win 7 or Vista
   hLib = LoadLibrary( L"dwmapi.dll" );
   GetProcAddress( hLib, "DwmIsCompositionEnabled" );
.
.
.

Posted 9-Dec-11 18:28pm

Minoo Khazeni

Comments

Albert Holguin 10-Dec-11 9:28am

Yep, you have to load it dynamically at run-time instead of statically... it's the only way to do it.