Re: [Dev-C++] MDI window again

[Vlada D. <dj...@im...>]

Hi, Igor
I checked the code and it seems exectly like the code you sent me the other
day (which works). I can't figure out what's the problem. I'm sending the
code, hope anyone can figure out what's wrong.

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

char g_sFrameClass[]="FrameWnd";
char g_sChildClass[]="ChildWnd";

HWND hFrameWnd=NULL;
HWND hMDIClient=NULL;
HWND hChildWnd=NULL;
HINSTANCE g_hInstance;

LRESULT CALLBACK FrameWndProc(HWND,UINT,WPARAM,LPARAM);
LRESULT CALLBACK ChildWndProc(HWND,UINT,WPARAM,LPARAM);

file://main function
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
                LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    MSG msg;
    g_hInstance=hInstance;

    /*frame window class*/
    wc.cbSize=sizeof(WNDCLASSEX);
    wc.style=0;
    wc.lpfnWndProc=FrameWndProc;
    wc.cbClsExtra=0;
    wc.cbWndExtra=0;
    wc.hInstance=hInstance;
    wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    wc.hCursor=LoadCursor(NULL,IDC_ARROW);
    wc.hbrBackground=(HBRUSH)COLOR_WINDOW;
    wc.lpszMenuName=NULL;
    wc.lpszClassName=g_sFrameClass;
    wc.hIconSm=LoadIcon(NULL,IDI_APPLICATION);

    /*register frame wnd class*/
    if(!RegisterClassEx(&wc))
    return 0;


    /*child window class*/
    wc.lpfnWndProc=(WNDPROC)ChildWndProc;
    wc.cbClsExtra=20;
    wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    wc.lpszMenuName=(LPCTSTR)NULL;
    wc.lpszClassName=g_sChildClass;

    /*register child window class*/
    if(!RegisterClassEx(&wc))
    return 0;

    /*create frame window*/
    hFrameWnd=CreateWindowEx(WS_EX_CLIENTEDGE,g_sFrameClass,"MDI
Window",WS_OVERLAPPEDWINDOW|

WS_CLIPCHILDREN,CW_USEDEFAULT,CW_USEDEFAULT,600,400,NULL,(HMENU)NULL,hInstan
ce,NULL);
    if(hFrameWnd=NULL)
    {
        MessageBox(NULL,"Could not create
window","Error",MB_ICONSTOP|MB_OK);
        return 0;
    }
    ShowWindow(hFrameWnd,SW_SHOW);
    UpdateWindow(hFrameWnd);

    /*message loop*/
    while(GetMessage(&msg,NULL,0,0))
    {
        if(!TranslateMDISysAccel(hMDIClient,&msg))
        {
                TranslateMessage(&msg);
                DispatchMessage(&msg);
        }
    }
    return msg.wParam;
}
/*frame window procedure*/
LRESULT CALLBACK FrameWndProc(HWND hFrameWnd,UINT msg,WPARAM wParam,LPARAM
lParam)
{
    switch(msg)
    {
        case WM_CREATE:
        {
            CLIENTCREATESTRUCT ccs;
            ccs.hWindowMenu=NULL;
            ccs.idFirstChild=50000;
            /*create client window*/

hMDIClient=CreateWindowEx(0,"MDICLIENT",(LPCTSTR)NULL,WS_CHILD|WS_CLIPCHILDR
EN,CW_USEDEFAULT,

CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,hFrameWnd,(HMENU)ccs.idFirstChild,
            g_hInstance,(LPVOID)&ccs);
            ShowWindow(hMDIClient,SW_SHOW);

            /*create child window*/

hChildWnd=CreateMDIWindow(g_sChildClass,"Untitled",WS_HSCROLL|WS_VSCROLL,CW_
USEDEFAULT,
            CW_USEDEFAULT,300,200,hMDIClient,g_hInstance,lParam);
            ShowWindow(hChildWnd,SW_SHOW);
        }
        break;
        case WM_CLOSE:
            DestroyWindow(hFrameWnd);
        break;
        case WM_DESTROY:
                PostQuitMessage(0);
        break;
        default:
                return DefFrameProc(hFrameWnd,hMDIClient,msg,wParam,lParam);
    }
    return 0;
}

LRESULT CALLBACK ChildWndProc(HWND hMDIChild,UINT msg,WPARAM wParam,LPARAM
lParam)
{
    return DefMDIChildProc(hMDIChild,msg,wParam,lParam);
}


----- Original Message -----
From: "Igor Pierscinski" <igo...@po...>
To: "DevC++ help" <dev...@li...>
Sent: Tuesday, November 12, 2002 4:26 PM
Subject: RE: [Dev-C++] MDI window again


Hi,

Without more information on what exactly you did I can only guess
but most probably you did something wrong in WinMain. That is:
- check handling of WM_CREATE in your frame window procedure
  and see if CreateWindow of the frame window returns a valid handle.
- you did not use ShowWindow before entering the message loop
or
- there is something wrong with the message loop.
After that you schould at least have a visible frame window.

Regards

Igor Pierscinski

-----Original Message-----
From: Vlada Djurovic [mailto:dj...@im...]
Sent: Tuesday, November 12, 2002 3:08 PM
To: 'DevC++ help'
Subject: [Dev-C++] MDI window again


Hi all
I have another unusual problem here. I wrote some code t display MDI window.
It compiled OK, but when I run it, nothing happens, I don't see the window.
In Task menager, I found my exe file under prosesses tab, so I guess it is
running, only the window doesn't show.  I used SW_SHOW when creating every
window.
The compiler log output:
g++.exe MDImain.o  -o
MDIFinal.exe" -L"C:\Dev-Cpp\lib"  -I"C:\Dev-Cpp\include"  -I"C:\Dev-Cpp\myIn
c"  -I"C:\Dev-Cpp\include\g++-3"  -I"C:\Dev-Cpp\include"  -I"C:\Dev-Cpp\myIn
c"   -g3 -mwindows

Execution terminated
Compilation successful

Hope someone can help.

Regards,
Vlada



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