I get compile error c2440 it tells me cannot convert from void please help

nah1337

#include #include #include #include #include #include #include #include #include #include //icludes are they windows.h ;stdio.h;detours.h;math.h;process.h;vector;mmsystem.h;tlhelp32.h

#pragma comment(lib, "glu32.lib")
#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "winmm.lib")

#define Client_GLDRAWELEMENTS 0x4E5DA2

#define CAST( Type, Address ) ( ( Type )( Address ) )

typedef void ( WINAPI *GLDRAWELEMENTS_TYPE )( GLenum iMode, GLsizei iCount, GLenum iType, const GLvoid *pvIndices );

GLDRAWELEMENTS_TYPE g_dwGlDrawElements = NULL;

void WINAPI glDrawElementsHook( GLenum iMode, GLsizei iCount, GLenum iType, const GLvoid *pvIndices )
{

( g\_dwGlDrawElements )( iMode, iCount, iType, pvIndices );

}

DWORD OpenGLHooks( PVOID pvArgs )
{
do
{
g_dwGlDrawElements = *( DWORD * )Client_GLDRAWELEMENTS;

           Sleep( 100 );

    } while( g\_dwGlDrawElements == NULL );

    \*( DWORD \* )Client\_GLDRAWELEMENTS = PtrToUlong( glDrawElementsHook );

    return NULL;

}

bool WINAPI DllMain(HINSTANCE hDll, DWORD dwReason, PVOID pvReserved)
{
if(dwReason == DLL_PROCESS_ATTACH)
{

CreateThread( NULL, 0, ( LPTHREAD\_START\_ROUTINE )OpenGLHooks, NULL, 0, NULL );



return true;
}
else if(dwReason == DLL\_PROCESS\_DETACH)
{
}
return false;

}

Cedric Moonen

Please, post the exact error message and tell us which line of code is the problem.

Cédric Moonen Software developer
Charting control [v1.5] OpenGL game tutorial in C++

nah1337

ok when i get at home then il post the excat error and tell you what line it has

nah1337

Im still not home but this is the line what creates the error and the code is compile ready i mean its the full source code u can just start compiling it and i belive u get the excat error: g_dwGlDrawElements = *( DWORD * )Client_GLDRAWELEMENTS;

David Crow

What is at address 0x4E5DA2? The while() loop does not appear to do anything since g_dwGlDrawElements is never NULL. Is that intentional?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

nah1337

well the excat error is this : error C2440: '=' : cannot convert from 'unsigned long' to 'void (__stdcall *)(unsigned int,int,unsigned int,const void *)' Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast Error executing cl.exe.

David Crow

Yes, a GLDRAWELEMENTS_TYPE cast will pacify the compiler. But that may not ultimately solve your problem. What are you trying to do?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

nah1337

Well i want to hook opengl gldrawelements and using pointer for it so i have to wait valid opengl pointers also and the GLDRAWELEMENTS_TYPE didnt fix the error or i used it wrongly can u post me the whole line how it should look like ?