Thread: Controls

Hello there..I need some help with controls in WIN APIs..Actually I just began programming in windows for an assignment and am not used to it. My problem is as follows:




I need to to display a string to a textbox when a button is ...So I used this piece of code in the "switch(Message)" :

Code:

case WM_COMMAND:
			switch(LOWORD(wParam))
			{
				case IDC_ADD:
				{

			SetDlgItemText(hwnd, IDC_TEXT, "This is a string");
			
}break;
}

Where IDC_... is defined in a header file and used in a resource file as follows:

Code:

IDD_MAIN DIALOG DISCARDABLE  0, 0, 207, 156
STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "Controls One"
FONT 8, "MS Sans Serif"
BEGIN
    LTEXT           "Add",IDC_STATIC,7,10,14,8
    EDITTEXT        IDC_TEXT,25,7,120,14,ES_AUTOHSCROLL
    EDITTEXT        IDC_NUMBER,150,7,21,14,ES_NUMBER
    LTEXT           "times.",IDC_STATIC,177,10,23,8
    LISTBOX         IDC_LIST,7,25,138,106,LBS_NOINTEGRALHEIGHT | 
                    LBS_EXTENDEDSEL | WS_VSCROLL | WS_TABSTOP
    PUSHBUTTON      "&Add",IDC_ADD,150,30,50,14
    PUSHBUTTON      "&Remove",IDC_REMOVE,150,47,50,14
    PUSHBUTTON      "&Clear",IDC_CLEAR,150,63,50,14
    LTEXT           "This item was added",IDC_STATIC,7,141,66,8
    CTEXT           "-",IDC_SHOWCOUNT,77,141,32,8
    LTEXT           "times",IDC_STATIC,114,141,17,8
END

BUT the project wont compile ..Displaying the error that STYLE DS_MODALFRAME is wrong.. So I tried giving an id for my button in the following code(discarding the definition in the resource file and in the header for the controls):

Code:

        //create a default push button
        CreateWindowEx(0,                                      //more or 'extended' styles
                       TEXT("BUTTON"),                         //'class' of control to create
                       TEXT("Roll Dice"),            //the control caption
                       WS_CHILD|WS_VISIBLE|BS_DEFPUSHBUTTON,   //control style: how it looks
                       500,                                     //control position: left
                       250,                                     //control position: top
                       100,                                    //control width
                       30,                                     //control height
                       hwnd,                                   //parent window handle
                       NULL,                                   //control's ID
                       g_hInst,                                //application instance
                       NULL);

Now the project compiles but the button dont work....CAN ANYONE PLZ HELP ME OUT??



Compiler : DEV C++
OS: WIN XP
Source code obtained from: theForger's Win32 API Tutorial & http://www.foosyerdoos.fsnet.co.uk/

Superdooper quick fix...
Change

Code:

NULL,                                   //control's ID

to

Code:

(HMENU)0x69,                                   //control's ID

Then change

Code:

case IDC_ADD:

to

Code:

case 0x69:

That should make it work, although it's not terribly good form. Use a MessageBox to test.

Ooohh Thx dude...u saved me hours of search over the net and hopeless compiling...n I raally badly needed time to complete the work..thx again...I guess I might define the IDs in the header.

Okay. Now am having quite an issue with a button. I had to change a button's caption once it has been clicked..Thats fine.
On button click a function is accessed and processing is done
What I need to do is to use the same button to stop processing.....I need to use something like keydown but I have not been able to get to know whta it should be..

In fact the processing is in a 'while loop' so I wanted to place an if statement in there to detect the button's click and change a state variable so that the loops stops...can anyone plz guide my search?