Control Panel Application

I'm having a little problem with this code;

Code:

---

#include <windows.h>
#include <cpl.h>
#include "resource.h"
//#include "CPLhhdr.h"

HINSTANCE hinst = NULL;

int WINAPI DllMain(HINSTANCE hinst, DWORD Reason, LPVOID)
{ return 1; }

LONG CALLBACK CPlApplet(HWND hwndCPL, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
{
    int i;
    LPCPLINFO lpCPlInfo;

    i = (int) lParam1;

    switch (uMsg) {
        case CPL_INIT:      // first message, sent once
            hinst = GetModuleHandle("test.cpl");
            return TRUE;
 
        case CPL_GETCOUNT:  // second message, sent once
            return 1;
            break;
 
        case CPL_INQUIRE: // third message, sent once per application
            lpCPlInfo = (LPCPLINFO) lParam2;
            lpCPlInfo->lData = 0;
            lpCPlInfo->idIcon = IDI_PC;
            lpCPlInfo->idName = IDS_NAME;
                        lpCPlInfo->idInfo = IDS_DESC;
            break;

        case CPL_DBLCLK:    // application icon double-clicked
            DialogBox(hinst, MAKEINTRESOURCE(IDD_DIALOG1), hwndCPL, NULL);
            break;
 
        case CPL_STOP:      // sent once per application before CPL_EXIT
            break;
 
        case CPL_EXIT:    // sent once before FreeLibrary is called
            break;
 
        default:
            break;
    }
    return 0;
}

---

It's supposed to be for a control panel application file, but when compiled, it gives me this error:

LINK : warning LNK4089: all references to "USER32.dll" discarded by /OPT:REF

And Control Panel acts like the function never existed - that is, it never calls the function.

What's wrong with the code? Could someone please send me a sample source code?

You should change DllMain to get the HINSTANCE from there:

Code:

---

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved) {
        if(dwReason == DLL_PROCESS_ATTACH) {
                hinst = hinstDLL;
        }

        return TRUE;
}

---

So, your CPL_INIT should now be:

Code:

---

case CPL_INIT:
    return TRUE;

---

And finally, do you have a .def file for the DLL you're making? It should read something like:

Code:

---

LIBRARY "test.dll"

EXPORTS
    DllMain
    CPlApplet

---

Try that and see how you go :)