Subj : Re: double clicks (mouse)
To   : borland.public.cpp.borlandcpp
From : Jack Sawatzky
Date : Fri Dec 17 2004 05:34 pm

I have a file < test.cpp > that had code from a previous test.  I  
cleared the text,
and carefully copyed in your code.  Then compiled it.  But in fact I had 
forgotten
to save  the file first, so the compiler gleefully compiled the previous 
code. (Red
in face.)

Now I did it right, and your file works perfectly.  I carefully compared 
your code
to mine and could see no important differences.  Maybe you can see something
I missed.

Thanks.


#include <windows.h>
#include <mmsystem.h>
#include <winbase.h>
#include <winuser.h>
#include <wingdi.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);


int WINAPI WinMain (HINSTANCE hInstance,  HINSTANCE hPrevInstance,
                                    LPSTR szCmdLine,  int iCmdShow)
{
    static char szAppName[] = "Electron";
    HDC hdc;
    HWND  hwnd;
    MSG msg;

    wndclass.cbSize  = sizeof (wndclass);
    wndclass.style  = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
    wndclass.lpfnWndProc  = WndProc;
    wndclass.cbClsExtra  =0;
    wndclass.cbWndExtra  =0;
    wndclass.hInstance  = hInstance;
    wndclass.hIcon  = LoadIcon (NULL, IDI_APPLICATION);
    wndclass.hCursor  = LoadCursor (NULL, IDC_ARROW);
    wndclass.hbrBackground  = (HBRUSH) GetStockObject (WHITE_BRUSH);
    wndclass.lpszMenuName  = NULL;
    wndclass.lpszClassName  = szAppName;
    wndclass.hIconSm  = LoadIcon (NULL, IDI_APPLICATION);

    RegisterClassEx (&wndclass);

    hwnd = CreateWindow (szAppName,         // window class name
            "Understand Electronics",     // window caption
            WS_OVERLAPPEDWINDOW,    // window style
            CW_USEDEFAULT,        // initial x position
            CW_USEDEFAULT,        // initial y position
            CW_USEDEFAULT,        // initial x size
            CW_USEDEFAULT,        // initial y size
            NULL,                // parent window handle
            NULL,                // window menu handle
            hInstance,            // program instance handle
            NULL);                // creation parameters

    clos.dwCallback = (DWORD)hwnd;

  
    SetDoubleClickTime(700);

    ShowWindow (hwnd, iCmdShow);
    UpdateWindow (hwnd);



    while (GetMessage (&msg, NULL, 0, 0) >0)
    {
        TranslateMessage (&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}


                                //WINDOW message handling
                       
LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM 
lParam)
{
    PAINTSTRUCT ps;
    RECT rect;
    char str[130];
    HBITMAP hbm;
    HDC hmem;
    HDC hDC;
 


    switch (iMsg)
    {
       case WM_CREATE :
            return 0;
       case WM_PAINT :                // 952x702 pixels
        hdc = BeginPaint (hwnd, &ps);
        SetTextAlign (hdc,TA_BASELINE);
        GetClientRect (hwnd, &rect);
        Cx=(LONG)(rect.left+rect.right)/2;
        Cy=(LONG)(rect.top+rect.bottom)/2;

         ......

  
        EndPaint (hwnd, &ps);
        return 0;
 

       case WM_LBUTTONDBLCLK :
            MessageBox(hwnd,"DoubleLeft","Button", MB_OK ); 
            return 0;

       case WM_LBUTTONDOWN :
            MessageBox(hwnd,"Left","Button", MB_OK ); 
            return 0;

       case WM_RBUTTONDOWN :
            MessageBox(hwnd,"Right","Button", MB_OK ); 
            return 0;

       case WM_DESTROY :
            PostQuitMessage (0);
            return 0;
    }
    return DefWindowProc (hwnd, iMsg, wParam, lParam);
}

.