Control Panel Application

[Microbasic]

I'm having a little problem with this 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?