static HWND page = NULL;
static int CALLBACK MainDlgProc (HWND hwnd, UINT msg,				 WPARAM wParam, LPARAM lParam) {    static HWND page = NULL;    if (msg == WM_COMMAND && LOWORD(wParam) == IDOK) {    }    if (msg == WM_COMMAND && LOWORD(wParam) == IDCX_ABOUT) {	EnableWindow(hwnd, 0);	DialogBox(hinst, MAKEINTRESOURCE(IDD_ABOUTBOX),		  GetParent(hwnd), AboutProc);	EnableWindow(hwnd, 1);        SetActiveWindow(hwnd);    }    return GenericMainDlgProc (hwnd, msg, wParam, lParam, 0);}