[C] Winapi Call Dynamically and easily

[dosprog]

It's likely not a good idea.
Any of imported functions must be correctly declared individulally,
and thus must be called normally.
In addition - without of using __asm directive.
In addition2 - repeated calls will be performed much faster.
In addition3 - [less or more] universal solution for x32/x64.

..It's likely not a good idea but it works..

--Add--

Add 1st argument of function as enum {C_CALL,STD_CALL}
and produce separate __asm code for this conventions ?



--Add2--

Originally Posted by 0xall0c

Example :

DWORD dwResult = DynCall("ntdll.dll","NtUnmapViewOfSection",
					PI.hProcess,
					(LPVOID)(NtHeader->OptionalHeader.ImageBase),0xb33f
				);

Dont forget to add one extra paramater at end i.e 0xb33f

This example rewritten without of DynCall():

DWORD(__stdcall*_NtUnmapViewOfSection)(DWORD,DWORD);

void main(void)
{
DWORD result;

if(!(_NtUnmapViewOfSection=(DWORD(__stdcall*)(DWORD,DWORD))GetProcAddress(LoadLibrary("ntdll.dll"),"NtUnmapViewOfSection")))goto dos_exit;

result=_NtUnmapViewOfSection(0,0);

dos_exit:;
}