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Image Not Showing

Discussion in 'Win32' started by hemanth.balaji, Jun 9, 2005.

  1. hemanth.balaji

    hemanth.balaji New Member

    Joined:
    May 22, 2005
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    I have to build a project. For that I am using an

    OWNER Drwan Menu. Now i want the small part of the

    remaining space to have an image. i.e a small logo

    in the top right corner of the application on the

    menu bar unused space. Now to dry that I just typed

    a code to display an image somewahere in the main

    window. But the output is not showing the Bitmap.

    Why is that.

    What is the probelm with the below code

    Code:
    #include <windows.h>
    #include"resource.h"
    
    #define ID_FILE_EXIT 9001
    #define ID_STUFF_GO 9002
    
    const char g_szClassName[] = "myWindowClass";
    HINSTANCE hInstance;
    
    LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, 
    
    WPARAM wParam, LPARAM lParam)
    {
    	HDC hDC, MemDCExercising;
        PAINTSTRUCT Ps;
        HBITMAP bmpExercising;
    	
    	switch(Message)
    	{
    		case WM_CREATE:
    		{
    			HMENU hMenu, hSubMenu;
    
    			hMenu = CreateMenu();
    
    			hSubMenu = 
    
    CreatePopupMenu();
    			AppendMenu(hSubMenu, 
    
    MF_STRING, ID_FILE_EXIT, "E&xit");
    			AppendMenu(hMenu, MF_STRING 
    
    | MF_POPUP, (UINT)hSubMenu, "&File");
    
    			hSubMenu = 
    
    CreatePopupMenu();
    			AppendMenu(hSubMenu, 
    
    MF_STRING, ID_STUFF_GO, "&Go");
    			AppendMenu(hMenu, MF_STRING 
    
    | MF_POPUP, (UINT)hSubMenu, "&Stuff");
    
    			SetMenu(hwnd, hMenu);
    
    		}
    		break;
    
    		case WM_PAINT:
    		{
    				hDC = 
    
    BeginPaint(hwnd, &Ps);
    
    				// Load the bitmap 
    
    from the resource
    				bmpExercising = 
    
    LoadBitmap(hInstance, 
    
    MAKEINTRESOURCE(IDB_EXERCISING));
    				// Create a memory 
    
    device compatible with the above DC variable
    				MemDCExercising = 
    
    CreateCompatibleDC(hDC);
    					 // Select 
    
    the new bitmap
    				
    
    SelectObject(MemDCExercising, bmpExercising);
    
    				// Copy the bits 
    
    from the memory DC into the current dc
    				BitBlt(hDC, 200, 
    
    200, 200, 200, MemDCExercising, 0, 0, SRCCOPY);
    
    				// Restore the old 
    
    bitmap
    				
    
    DeleteDC(MemDCExercising);
    				
    
    DeleteObject(bmpExercising);
    				EndPaint(hwnd, 
    
    &Ps);
    		}
    		break;
    
    		case WM_COMMAND:
    			switch(LOWORD(wParam))
    			{
    				case ID_FILE_EXIT:
    					
    
    PostMessage(hwnd, WM_CLOSE, 0, 0);
    				break;
    				case ID_STUFF_GO:
    					break;
    			}
    		break;		
    
    		case WM_CLOSE:
    			DestroyWindow(hwnd);
    		break;
    		case WM_DESTROY:
    			PostQuitMessage(0);
    		break;
    		default:
    			return DefWindowProc(hwnd, 
    
    Message, wParam, lParam);
    	}
    	return 0;
    }
    
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE 
    
    hPrevInstance,
    	LPSTR lpCmdLine, int nCmdShow)
    {
    	WNDCLASSEX wc;
    	HWND hwnd;
    	MSG Msg;
    
    	wc.cbSize		 = 
    
    sizeof(WNDCLASSEX);
    	wc.style		 = 0;
    	wc.lpfnWndProc	 = WndProc;
    	wc.cbClsExtra	 = 0;
    	wc.cbWndExtra	 = 0;
    	wc.hInstance	 = hInstance;
    	wc.hIcon		 = NULL;
    	wc.hCursor		 = LoadCursor(NULL, 
    
    IDC_ARROW);
    	wc.hbrBackground = 
    
    (HBRUSH)(COLOR_WINDOW+1);
    	wc.lpszMenuName  = NULL;
    	wc.lpszClassName = g_szClassName;
    	wc.hIconSm		 = NULL;
    
    	RegisterClassEx(&wc);
    
    	hwnd = CreateWindowEx(
    		WS_EX_CLIENTEDGE, 	
    
    g_szClassName, 	"A Menu ", 	
    
    WS_OVERLAPPEDWINDOW,
    		CW_USEDEFAULT, CW_USEDEFAULT, 240, 
    
    120, NULL, NULL, hInstance, NULL);
    
    	if(hwnd == NULL)
    	{
    		MessageBox(NULL, "Window Creation 
    
    Failed!", "Error!",
    			MB_ICONEXCLAMATION | 
    
    MB_OK);
    		return 0;
    	}
    
    	ShowWindow(hwnd, nCmdShow);
    	UpdateWindow(hwnd);
    
    	while(GetMessage(&Msg, NULL, 0, 0) > 0)
    	{
    		TranslateMessage(&Msg);
    		DispatchMessage(&Msg);
    	}
    	return Msg.wParam;
    }
    I have also uploaded the project itself :

    http://www.geocities.com/kalamirch/menu_two.zip
     
  2. shabbir

    shabbir Administrator Staff Member

    Joined:
    Jul 12, 2004
    Messages:
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    Trophy Points:
    83
    If you can format the code a bit more using BB code it will be easier for us to go through the codes

    Below are MFC code but I have commented so that you as Win32 programmer can also understand
    Code:
    	//Create a device context to load the bitmap into
     	CDC dcMem;
     	dcMem.CreateCompatibleDC(pdc);
     
     	//Get the Display area available
     	CRect lRect;
     	GetClientRect(lRect);
     	lRect.NormalizeRect();
     
     	//select the bitmap into compatible device context
     	CBitmap* pOldBitmap = (CBitmap*)dcMem.SelectObject
     	(&m_bmpBitmap);
     	//m_bmpBitmap.SetBitmapDimension(lRect.Width(),lRect.Height());
     
     	//copy & resize the window to the dialog window
     	pdc->StretchBlt(0,0,lRect.Width(),lRect.Height(),&dcMem,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
     
    The above code will not run but just have the concept of displaying the bitmap.

    If you want I can give you the code in which above code is running.

    Thanks
    Shabbir Bhimani
     

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