#include <windows.h>

HINSTANCE	hCtl3d;

void WINAPI Ctl3dLoad(HINSTANCE hInst)
{
	BOOL (WINAPI *Ctl3dRegister)(HANDLE);
	BOOL (WINAPI *Ctl3dAutoSubclass)(HANDLE);

	SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
	hCtl3d = LoadLibrary("ctl3dv2.dll");
	if ((UINT)hCtl3d <= HINSTANCE_ERROR)
		hCtl3d = LoadLibrary("ctl3d.dll");

	if ((UINT)hCtl3d <= HINSTANCE_ERROR)
	{
		hCtl3d = 0;
		return;
	}	

	Ctl3dRegister = (BOOL (WINAPI *)(HANDLE))GetProcAddress(hCtl3d, "Ctl3dRegister");
	Ctl3dAutoSubclass = (BOOL (WINAPI *)(HANDLE))GetProcAddress(hCtl3d, "Ctl3dAutoSubclass");

	if (Ctl3dRegister && Ctl3dAutoSubclass)
	{
		Ctl3dRegister(hInst);
		Ctl3dAutoSubclass(hInst);
	}

	SetErrorMode(0);
}

void WINAPI Ctl3dUnload(HINSTANCE hInst)
{
	BOOL (WINAPI *Ctl3dUnRegister)(HANDLE);

	if (hCtl3d)
	{
		Ctl3dUnRegister = (BOOL (WINAPI *)(HANDLE))GetProcAddress(hCtl3d, "Ctl3dUnRegister");
		if (Ctl3dUnRegister)
			Ctl3dUnRegister(hInst);

		FreeLibrary(hCtl3d);
	}
}

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{                              
	Ctl3dLoad(hInstance);
	MessageBox(NULL, "With CTL3D", "Test", MB_OK + MB_ICONINFORMATION);

	Ctl3dUnload(hInstance);
	MessageBox(NULL, "Without CTL3D", "Test", MB_OK + MB_ICONINFORMATION);

	return FALSE;
}