opening a window that has no title bar with win32

Question

I'm developing a c++ application for windows. I'm using win32 API. I have a very simple question, which i couldn't find an answer to. How can i open a window without a title bar (without controls, icon and title) and that can not be resized.

Piece of code that i am using for the application to create a window:

      hWnd = CreateWindow(szWindowClass, 0, (WS_BORDER ),
             0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL);

UPDATE:

To do this in c#, you just define this code:

 FormBorderStyle = System.Windows.Forms.FormBorderStyle.SizableToolWindow;
 ControlBox = false;

Answer 1

hWnd = CreateWindow(szWindowClass, 0, (WS_BORDER ), 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL); 

SetWindowLong(hWnd, GWL_STYLE, 0); //remove all window styles, check MSDN for details

ShowWindow(hWnd, SW_SHOW); //display window

Answer 2

Omit the WS_BORDER style:

See CreateWindow function: http://msdn.microsoft.com/en-us/library/ms632679%28v=vs.85%29.aspx

Window Styles: http://msdn.microsoft.com/en-us/library/ms632600%28v=vs.85%29.aspx

Answer 3

HWND hWnd ;
hWnd = CreateWindow(szWindowClass, 0, (WS_BORDER ), 0, 0, 100, 100, NULL, NULL, Instance, NULL); 
SetWindowLong(hwnd, GWL_STYLE, WS_BORDER );  // With 1 point border
//OR
SetWindowLong(hwnd, GWL_STYLE, 0 );  // Without 1 point border = white rectangle 
SetWindowPos(hwnd, 0, 150, 100, 250, 250, SWP_FRAMECHANGED); 

if (!hWnd)
 return FALSE ;
else
ShowWindow(hwnd, SW_SHOW);

Answer 4

CreateWindowEx(0, szWindowClass, 0, WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_POPUP, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL);

using SetWindowLong will change the size and post. use the WS_POPUP style

Answer 5

SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_TOOLWINDOW);