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kitterz
Grandmaster Cheater Supreme
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Joined: 24 Dec 2007
Posts: 1268
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 Posted: Fri Jun 06, 2008 7:10 pm Post subject: C++ help with .dll |
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| Code: | #include <windows.h>
#include "stdafx.h"
DWORD WINAPI Start(){
Sleep(500);
MessageBox( 0, "Hi!", 0, 0 );
Sleep(500);
ExitThread(0);
return 0;
}
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)&Start, 0, 0, NULL );
break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
} |
I get this eror:
| Code: | | error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [10]' to 'LPCWSTR' |
Help Please
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Renkokuken
GO Moderator
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Joined: 22 Oct 2006
Posts: 3249
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| Posted: Fri Jun 06, 2008 7:25 pm Post subject: |
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Either use a Multi-Byte character set, or use one of the following:
1) WideCharToMultiByte
2) Include tchar.h and use the _T() definition.
3) Either coat the string with TEXT(), or place an L before the start of a string.
http://msdn.microsoft.com/en-us/library/ms776440.aspx
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kitterz
Grandmaster Cheater Supreme
![]() Reputation: 0
Joined: 24 Dec 2007
Posts: 1268
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| Posted: Fri Jun 06, 2008 7:30 pm Post subject: |
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| Renkokuken wrote: | Either use a Multi-Byte character set, or use one of the following:
1) WideCharToMultiByte
2) Include tchar.h and use the _T() definition.
3) Either coat the string with TEXT(), or place an L before the start of a string.
http://msdn.microsoft.com/en-us/library/ms776440.aspx |
Can you give an example/chage it?
Cause im a newbie at this .dll stuff.
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Renkokuken
GO Moderator
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Joined: 22 Oct 2006
Posts: 3249
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| Posted: Fri Jun 06, 2008 7:52 pm Post subject: |
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Sure.
To use a Multi-Byte character set, just right click your solution in the Solution Explorer, click Properties, and under the General tab, change "Character Set" to "Use Multi-Byte character set."
For the others:
1) http://msdn.microsoft.com/en-us/library/ms776420.aspx
2) Personal preference. Have "tchar.h" included in your project, and just coat strings with it's _T() macro.
Error example:
| Code: | | MessageBoxW( 0, "This is a char string", "Hello world!", MB_OK | MB_ICONINFORMATION ); // error C2664 |
Proper usage is as follows:
| Code: | #include <tchar.h>
...
MessageBoxW( 0, _T( "This is a char string" ), _T( "Hello world!" ), MB_OK | MB_ICONINFORMATION ); // No error |
3) Same as above, but instead of _T(), use just TEXT(). As for the L operator...
Example:
| Code: | | MessageBoxW( 0, L"This is a char string", L"Hello world!", MB_OK | MB_ICONINFORMATION ); // No error |
I apologize if there are any typos, it's late and I just woke up ( reversed sleeping habits for the win ). Hope it helps.
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kitterz
Grandmaster Cheater Supreme
![]() Reputation: 0
Joined: 24 Dec 2007
Posts: 1268
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| Posted: Fri Jun 06, 2008 7:55 pm Post subject: |
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| Renkokuken wrote: | Sure.
To use a Multi-Byte character set, just right click your solution in the Solution Explorer, click Properties, and under the General tab, change "Character Set" to "Use Multi-Byte character set."
For the others:
1) http://msdn.microsoft.com/en-us/library/ms776420.aspx
2) Personal preference. Have "tchar.h" included in your project, and just coat strings with it's _T() macro.
Error example:
| Code: | | MessageBoxW( 0, "This is a char string", "Hello world!", MB_OK | MB_ICONINFORMATION ); // error C2664 |
Proper usage is as follows:
| Code: | #include <tchar.h>
...
MessageBoxW( 0, _T( "This is a char string" ), _T( "Hello world!" ), MB_OK | MB_ICONINFORMATION ); // No error |
3) Same as above, but instead of _T(), use just TEXT(). As for the L operator...
Example:
| Code: | | MessageBoxW( 0, L"This is a char string", L"Hello world!", MB_OK | MB_ICONINFORMATION ); // No error |
I apologize if there are any typos, it's late and I just woke up ( reversed sleeping habits for the win ). Hope it helps. |
You are the best! Thanks for the help
+ rep
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Renkokuken
GO Moderator
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Joined: 22 Oct 2006
Posts: 3249
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| Posted: Fri Jun 06, 2008 8:02 pm Post subject: |
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| Glad to help, just ask if you need any more assistance in the future.
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