Trying to change a window title in a loop as it is create

[mlwhiteley]

Hi, I am trying to create 5 windows from the same class for a homework assignment. I put in a loop that will loop 5 times and create my 5 windows but I can not figure out how to change the titles of the windows with a variable. I have tried a array of strings but that didn't work. Any help would be greatly appreciated.

//Opens a window in Windows
//Michael Whiteley

// INCLUDES ///////////////////////////////////////////////
#define WIN32_LEAN_AND_MEAN  // just say no to MFC

#include <windows.h>   // include all the windows headers
#include <windowsx.h>  // include useful macros
#include <stdio.h>     
#include <math.h>

// DEFINES ////////////////////////////////////////////////

// defines for windows 
#define WINDOW_CLASS_NAME "WINCLASS1"

// GLOBALS ////////////////////////////////////////////////
#define WIN_POS_X		0		//opening windows x position
#define WIN_POS_Y		0		//opening windows y position
#define WIN_OFFSET_X	300		//opening windows x offset
#define WIN_OFFSET_Y	100		//opening windows y offset

// FUNCTIONS //////////////////////////////////////////////
LRESULT CALLBACK WindowProc(HWND hwnd, 
						    UINT msg, 
                            WPARAM wparam, 
                            LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT		ps;		// used in WM_PAINT
HDC				hdc;	// handle to a device context

// what is the message 
switch(msg)
	{	
	case WM_CREATE: 
        {
		// do initialization stuff here

        // return success
		return(0);
		} break;

	case WM_PAINT: 
		{
		// simply validate the window
		hdc = BeginPaint(hwnd,&ps);	 
		// you would do all your painting here
        EndPaint(hwnd,&ps);

        // return success
		return(0);
   		} break;

	case WM_DESTROY: 
		{
		// kill the application, this sends a WM_QUIT message 
		PostQuitMessage(0);

        // return success
		return(0);
		} break;

	default:break;

    } // end switch

// process any messages that we didn't take care of 
return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

// WINMAIN ////////////////////////////////////////////////
int WINAPI WinMain(	HINSTANCE hinstance,
					HINSTANCE hprevinstance,
					LPSTR lpcmdline,
					int ncmdshow)
{

WNDCLASSEX winclass; // this will hold the class we create
HWND	   hwnd;	 // generic window handle
MSG		   msg;		 // generic message

// first fill in the window class stucture
winclass.cbSize         = sizeof(WNDCLASSEX);
winclass.style			= CS_DBLCLKS | CS_OWNDC | 
                          CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc	= WindowProc;
winclass.cbClsExtra		= 0;
winclass.cbWndExtra		= 0;
winclass.hInstance		= hinstance;
winclass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor		= LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground	= (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName	= NULL;
winclass.lpszClassName	= WINDOW_CLASS_NAME;
winclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION);

// register the window class
if (!RegisterClassEx(&winclass))
	return(0);

for(int i = 0; i < 5; i++)
{
	// create the window
	if (!(hwnd = CreateWindowEx(NULL, // extended style
								WINDOW_CLASS_NAME,   // class
								"Window Title", // title
								WS_OVERLAPPEDWINDOW | WS_VISIBLE,
					 			WIN_POS_X + (i * WIN_OFFSET_X),WIN_POS_Y + (i * WIN_OFFSET_Y),	    // initial x,y
								300,100,  // initial width, height
								NULL,	    // handle to parent 
								NULL,	    // handle to menu
								hinstance,// instance of this application
								NULL)))	// extra creation parms
	{
		return(0);
	}//end if
}

// enter main event loop
while(GetMessage(&msg,NULL,0,0))
 	 { 
	 // translate any accelerator keys
	 TranslateMessage(&msg);

	 // send the message to the window proc
	 DispatchMessage(&msg);
	 } // end while

// return to Windows like this
return(msg.wParam);

} // end WinMain

///////////////////////////////////////////////////////////

[Lamblion]

Are you trying to put a different title in the TitleBar of the Window, or in the Client area of the window?

If you just want to put a different title in the TitleBar of the window, you've walked a mile to go an inch.

All you have to do is create your string array and then loop through it with this single statement --

for(int i = 0; i < 5; i++)
   SetWindowText(hwnd, szTitle[i]);

You also have to make sure you get a different window handle each time.

[Lamblion]

After looking at your code more closely, you need to do this...

Instead of HWND hwnd; you should do HWND hwnd[5];

Then you set your loop and do this...

hwnd[i]=CreateWindowEx(NULL, WINDOW_CLASS_NAME, "",...

In other words, you leave the title blank because right after you create the window you're going to do this...

SetWindowText(hwnd[i], szTitle[i]);

And now you're good to go.