[Dev-C++] WinAPP

This WinApp closes too fast to see results

#include <windows.h>


LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsgId, WPARAM wParam, LPARAM 
lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR 
pszCmdLine, int nCmdShow)
{
	static char szAppName[] = "hello";
	HWND hWnd;
	MSG msg;
	WNDCLASSEX wndClass;

	//register class
	wndClass.style = 0;
	wndClass.lpfnWndProc = WindowProc;
	wndClass. cbClsExtra = 0;
	wndClass.hInstance = hInstance;
	wndClass.hIcon = LoadIcon( hInstance, szAppName);
	wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndClass.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
	wndClass.lpszMenuName = NULL;
	wndClass.lpszClassName = szAppName;
	wndClass.hIconSm = wndClass.hIcon;

	if(RegisterClassEx(&wndClass)==0)//register class...
		return 0;  //quit if it doesn't work

	//now create window
	hWnd = CreateWindow(szAppName, szAppName, WS_OVERLAPPEDWINDOW, 
CW_USEDEFAULT, CW_USEDEFAULT,
		                 CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, 
NULL);

	if(hWnd == NULL)
		return 0;

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow( hWnd );

	while( GetMessage(&msg, NULL, 0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}


//process functions
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsgId, WPARAM wParam, LPARAM 
lParam)
{
	static char *pszHello = "Hello, world";

switch(uMsgId)
	{
	case WM_PAINT:
		{
			HDC hDC;
			PAINTSTRUCT paintStruct;

			hDC = BeginPaint( hWnd, &paintStruct);

			TextOut(hDC, 0,0, pszHello, lstrlen(pszHello));

			EndPaint( hWnd, &paintStruct );
		}
		break;

	case WM_DESTROY:
			PostQuitMessage(0);

			break;

	default:
		return DefWindowProc(hWnd,uMsgId,wParam,lParam);
	}
	return 0;
}

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