how can i make my hack work on win8 ?

i think WINAPI doesn't work any more in win8
how can i make my hack work fine with win8

i tried to but 6.2

__declspec(naked)VOID WINAPI DrawIndexedPrimitive_Call()
{
if ( !DrawIndexedPrimitive_Check )
{
DrawIndexedPrimitive_Breakpoint();
DrawIndexedPrimitive_Check = true;
}

if ( Tools.CheckWindowsVersion(6,1,VER_NT_WORKSTATION) || Tools.CheckWindowsVersion(6,0,VER_NT_WORKSTATION) )
{
__asm
{
MOV EDI,DWORD PTR SS:[EBP+0x8] // --- Vista and 7
XOR EBX,EBX
CMP EDI,EBX
PUSHFD
PUSHAD
JMP UCFORUM
}
}

if ( Tools.CheckWindowsVersion(5,1,VER_NT_WORKSTATION) || Tools.CheckWindowsVersion(5,2,VER_NT_WORKSTATION) )
{
__asm
{
PUSH EBX // --- XP
PUSH ESI
MOV ESI,dword ptr ss:[ebp+8]
PUSHFD
PUSHAD
JMP UCFORUM
}
}