A noob question

[Zooom]

hello ,

Is it possible to detour the glBegin function to a code stub ?

For example from an external process I do virtualallocex then writeprocessmemory to write a stub/byte array
into the target process and redirect glBegin into that stub/byte array I just wrote ?

Ive been successful in redirecting glBegin by doing eathook in my exe, then after getting the offset,
use writeprocessmemory to change the offset value in opengl32.dll in the target process(hl.exe) .
But when it comes to the stub I get crash ...

So , Ive tried something like this but crash .

What I do wrong ?

__declspec(naked) GLBEGUN( GLenum mode)
{
__asm
{
push mode
call p_glBegin
ret
}

}

Thank you in advance .