rundll32 implementation

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:

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

I believe the correct signature for Rundll32 is:

Code:

---

typedef void (CALLBACK *DLLFUNC)(HWND,HINSTANCE,LPTSTR,int);

---

simple example of call...

Code:

---

(DLLFUNC)(GetDesktopWindow()
        , 0
        , "\\windows\\system32\\timedate.cpl"
        , 0
        );

---

hi there :-)
thank you for your reply.
the program still doesn't start the "clock properties window" but at least
doesn't crash anymore :-)

i'll keep trying and when i get it (if i get it), i post the solution here.

with best regards,
typecast

ok, i got it :-)

you just need to give the whole path .. stupid me :-))

thank you!! :)

typecast

Code:

---

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

typedef LPVOID (CALLBACK* DLLFUNC)(HWND, HINSTANCE, LPTSTR, int);

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(GetDesktopWindow(), 0,"c:\\winnt\\system32\\TimeDate.cpl",0);                               
                        }
                }

                FreeLibrary(hMod);
        }
        return 0;
}

---