narntop

UINT TimerId;
int clicks;

    VOID CALLBACK TimerProc(HWND hWnd, UINT nMsg, UINT nIDEvent, DWORD dwTime)
    {
        KillTimer(NULL, TimerId);
        if (clicks < 2 && !double_click){
            MessageBox(hWnd, L"Show Widget", L"Widget", MB_OK);
        }

        clicks = 0;
    }



  LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
    {

        int wmId, wmEvent;
        PAINTSTRUCT ps;
        HDC hdc;
        TCHAR szHello[MAX_LOADSTRING];
        LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
        UINT uID;
        UINT uMouseMsg;

        uID = (UINT)wParam;
        uMouseMsg = (UINT)lParam;

        if (uMouseMsg == WM_LBUTTONDBLCLK){
            double_click = true;
            MessageBox(hWnd, L"Double click", L"CAPT", MB_OK);
            return 0;
        }
        if (uMouseMsg == WM_LBUTTONDOWN){
            double_click = false;
            clicks++;

            //single click opens context menu
            if (clicks == 1){
                TimerId = SetTimer(NULL, 0, 500, &TimerProc);
            }
            return 0;
        }
    ,...
    }