I can't work this out

This is my code:

Code:

---


#include <tchar.h>
#include "resource.h"

BOOL MainDialogProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
        switch (uMsg)
        {
        case WM_COMMAND:
                return MainDialog_OnCommand(hWnd, LOWORD(wParam), HIWORD(wParam), (HWND)lParam);

        case WM_CLOSE:
                EndDialog(hWnd, 0);
                return TRUE;
        }
        return FALSE;
}

BOOL MainDialog_OnCommand(HWND hWnd, WORD wCommand, WORD wNotify, HWND hControl)
{
        switch (wCommand)
        {
        case IDOK:
                MessageBox(hWnd, _T("Bye-bye world!"), _T("Sample Application"), MB_OK);

                // fall through

        case IDCANCEL:
                EndDialog(hWnd, wCommand);
                break;
        }
        return TRUE;
}



int _tmain(void)
{
        DialogBoxParam(GetModuleHandle(NULL), MAKEINTRESOURCE(IDD_DIALOG1),
                NULL, (DLGPROC)MainDialogProc, 0);
        return 0;
}

---

When I go to complie it it comes back with two warnings:

dialog.c: 10 missing prototype for MainDialog_OnCommand

and

dialog.c: 20 declaration of 'MainDialog_OnCommand' does not match previous declaration at dialog.c: 10

Please help me thanks
Daniel Granger

put this line above MainDialogProc:

BOOL MainDialog_OnCommand(HWND hWnd, WORD wCommand, WORD wNotify, HWND hControl);