rundll32 implementation

[typecast]

hello there,
i have the following problem:
i want to implement my own function just like rundll32, so
i could open from my funtion for example the "System Clock Properties Window" (double click over the clock icon) just like
with rundll32 (e.g.: c:\>rundll32 shell32,Control_RunDLL TimeDate.cpl,,0 -> opens
the Clock properties...), so
i read the documentation in MSDN about how rundll32 works and
wrote the following code:

#define LEAN_AND_MEAN
#include <windows.h>
#include <winbase.h>

typedef LPVOID (CALLBACK* DLLFUNC)(LPSTR);

int main()
{
	HMODULE hMod = NULL;
	DLLFUNC ProcAdd = NULL;

	hMod = LoadLibrary("c:\\winnt\\system32\\shell32.dll");
	if (hMod != NULL)
	{
		if (hMod)
		{
			ProcAdd = (DLLFUNC) GetProcAddress(hMod, "Control_RunDLL");
			if (ProcAdd)
			{				
				(DLLFUNC) ProcAdd("TimeDate.cpl,,0");
			}
		}

		FreeLibrary(hMod);
	}
	return 0;
}

but the program crash after calling "(DLLFUNC) ProcAdd(..." code line.
i've tried also to declare the DLLFUNC like this "EntryPoint function" just like in MSDN with the 4 parameters (hwnd, hInstance, etc.) but didn't work also ...
I think the problem is, because "Control_RunDLL" takes somehow different parameters and i can't call the function correct.
Does anyone have an idea what's going on and how should i implement this correct?

thank you in advance,
typecast