Something wrong with PUSHBUTTON

This is a discussion on Something wrong with PUSHBUTTON within the Windows Programming forums, part of the Platform Specific Boards category; I just programmed the Child Window BS_PUSHBUTTON. Well, my problem is that when I move around the main window, it ...

  1. #1
    the Corvetter
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    Sep 2001
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    Something wrong with PUSHBUTTON

    I just programmed the Child Window BS_PUSHBUTTON. Well, my problem is that when I move around the main window, it "disappears". And then when I wanted to test out the WM_COMMAND message I processed it like this:

    Code:
    case WM_COMMAND:
        MessageBox(NULL, TEXT("Test"), TEXT("Test"), MB_OK);
        return 0;
    And nothing happened. Can you answer my questions and solve my problems? Thanks!

    --Garfield
    1978 Silver Anniversary Corvette

  2. #2
    Just one more wrong move. -KEN-'s Avatar
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    well some code might be nice...

    Be sure you ddidn't do soemthing stupid I once did, and put the createwindow() in WM_PAINT....I did that once...baffled me for a while until I realized I had typed "PAINT" instead of "CREATE"...oh well

    But CODE, garfield. Code. How can we solve your problems with a vague description and nothing more?

  3. #3
    the Corvetter
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    Umm...this is the code. I had deleted some parts of it and then I just quickly put some of the code back in (I think I might have some parameters of CreateWindow wrong -- but that's not the initial problem).

    Code:
    /****************************************************
    ****	FirstButton -- an example to create child****
    ****	window controls starting with the button ****
    ****************************************************/
    
    #include <windows.h>
    
    /***************************************************
    ****	Function Prototypes:					****
    ****		- WndProc : main window procedure	****
    ***************************************************/
    
    LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
    
    /***************************************************
    ****	Globals/Constants:						****
    ****	hInst : Global type HINSTANCE			****
    ****	NUM : Constant number of buttons		****
    ***************************************************/
    
    #define NUM 1
    HINSTANCE hInst;
    
    /***************************************************
    ****	Main Code Section/Functions/Definitions:****
    ****		- WinMain							****
    ****		- WndProc : main window procedure	****
    ***************************************************/
    
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int nCmdShow)
    {
    	HWND			hwnd;
    	WNDCLASS		wc;
    	MSG				msg;
    	TCHAR			szClassName[] = TEXT("MainWindow");
    
    	wc.cbClsExtra = 0;
    	wc.cbWndExtra = 0;
    	wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
    	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    	wc.hInstance = hInstance;
    	wc.lpfnWndProc = WndProc;
    	wc.lpszClassName = szClassName;
    	wc.lpszMenuName = NULL;
    	wc.style = CS_HREDRAW | CS_VREDRAW;
    
    	if(!RegisterClass(&wc))
    	{
    		MessageBox(NULL, TEXT("Error registering window!"), szClassName, MB_ICONEXCLAMATION | MB_OK);
    		return 0;
    	}
    
    	hInst = hInstance;
    
    	hwnd = CreateWindow(szClassName, TEXT("Main Window"),
    						WS_OVERLAPPEDWINDOW,
    						CW_USEDEFAULT, CW_USEDEFAULT,
    						CW_USEDEFAULT, CW_USEDEFAULT,
    						NULL, NULL, hInstance, NULL);
    
    	ShowWindow(hwnd, nCmdShow);
    	UpdateWindow(hwnd);
    
    	while(GetMessage(&msg, NULL, 0, 0))
    	{
    		TranslateMessage(&msg);
    		DispatchMessage(&msg);
    	}
    
    	return msg.wParam;
    }
    
    /***************************************************
    ****	WndProc : main window procedure			****
    ***************************************************/
    
    LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    {
    	static HWND hwndButton;
    	HDC			hdc;
    	static int	cyChar, cxChar;
    
    	switch(message)
    	{
    	case WM_CREATE:
    		cxChar = LOWORD(GetDialogBaseUnits());
    		cyChar = HIWORD(GetDialogBaseUnits());
    
    	hwndButton = CreateWindow("button", TEXT("firstbutton"),
    		WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
    		cxChar, cyChar, 20 * cxChar, 7 * cyChar / 4,
    		hwnd, (HMENU) 1, hInst, NULL);
    
    	return 0;
    
    	case WM_SIZE:
    		return 0;
    
    	case WM_PAINT:
    		return 0;
    
    	case WM_COMMAND:
    	MessageBox(NULL, TEXT("Test"), TEXT("Test"), MB_OK);
    	return 0;
    
    	case WM_DESTROY:
    	PostQuitMessage(0);
    	return 0;
    
    	default:
    		break;
    	}
    	return DefWindowProc(hwnd, message, wParam, lParam);
    }
    Garfield
    1978 Silver Anniversary Corvette

  4. #4
    Registered User
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    here's your mistake:

    case WM_PAINT:
    break;

    not

    case WM_PAINT:
    return 0;

    good luck!
    U.
    Quidquid latine dictum sit, altum sonatur.
    Whatever is said in Latin sounds profound.

  5. #5
    the Corvetter
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    ::slaps face:: I should have known that! Of course, I'm processing the WM_PAINT method with just returning without processing. I should pass it on to DefWindowProc. Thanks, dude!
    1978 Silver Anniversary Corvette

  6. #6
    train spotter
    Join Date
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    near a computer
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    Also watch that you have given the button an ID# of one.

    I would use more descriptive ID's, especially when you need more controls.

    ie
    #define IDB_BUTTON1 10001
    and use this as the HMENU cast.
    "Man alone suffers so excruciatingly in the world that he was compelled to invent laughter."
    Friedrich Nietzsche

    "I spent a lot of my money on booze, birds and fast cars......the rest I squandered."
    George Best

    "If you are going through hell....keep going."
    Winston Churchill

  7. #7
    the Corvetter
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    Okay. Thanks, guys!
    1978 Silver Anniversary Corvette

  8. #8
    Registered User
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    Dec 2001
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    421
    no problem.

    By the way, are you the dude that's helping Oskilian out on Aurora?
    Quidquid latine dictum sit, altum sonatur.
    Whatever is said in Latin sounds profound.

  9. #9
    the Corvetter
    Join Date
    Sep 2001
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    Yeah, Uraldor, I am. Go to osky's board so we can talk. He might have started a thread, but I'm not sure. Well anyway, we have to sort this out and assign jobs to each other.

    If you get a minute, can you PM me your e-mail address, Uraldor?

    --Garfield
    1978 Silver Anniversary Corvette

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