# OpenGL Borderless OpenGL Window (Not fullscreen)

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Toji    535
Simple question, and one that probably will be solved by some obscure win32 flag that I don't know. Can one create a borderless OpenGL window in Win32? I've been trying to create a window using WS_POPUP|WS_VISIBLE, but while the program shows up in the task bar but the window itself never displays. Any suggestions? Here's my (simple simple) window creation code
[source lang=cpp]
WNDCLASSEX wc;
wc.cbSize        = sizeof(WNDCLASSEX);
wc.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc   = WndProc;
wc.cbClsExtra    = 0;
wc.cbWndExtra    = 0;
wc.hInstance     = hInst;
wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wc.lpszClassName = "GLSimple";

if(!RegisterClassEx(&wc)) {
return 0;
}

hwnd = CreateWindowEx(
NULL,
"GLSimple",
"OpenGL Simple Example",
WS_POPUP|WS_VISIBLE|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
(HWND) NULL, (HMENU) NULL, hInst, (LPVOID) NULL);

if(hwnd == NULL) {
return 0;
}



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if i recall right, CW_USEDEFAULT does not work for popup windows...

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Toji    535
Well you learn something new every day, no? Thanks for the speedy reply, that worked wonderfully! Crazy, crazy Win32...

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Smit    310
Create the window with normal borders then do something like (Pseudo):

// Get current styleslong lWS = GetWindowLong(WS) // for current WS style.long lWSEX = GetWindowLong(WS_EX) //for current WS_EX style.// Bitwise OR the flags you don't want (WS_OVERLAPPEDWINDOW etc.)lWS =| ~WS_OVERLAPPEDWINDOWlWSEX =| ~WS_EX_WHATEVERELSE // Add the flags you want.lWS =& WS_POPUPlWSEX =& WS_EX_WHATEVERELSE// Set the new styles:SetWindowLong(lWS)SetWindowLong(lWSEX)//Update windowSetWindowPos( )

It's what I use to toggle between fullscreen and bordered windows.

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bubu LV    1436
Smit: &= will never set bit if it already isn't there: 0101 & 0011 = 0001
You need to swap &= with |= in your post.

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nullsquared    126
Quote:
 Original post by SmitCreate the window with normal borders then do something like (Pseudo):// Get current styleslong lWS = GetWindowLong(WS) // for current WS style.long lWSEX = GetWindowLong(WS_EX) //for current WS_EX style.// Bitwise /*OR*/AND the flags you don't want (WS_OVERLAPPEDWINDOW etc.)lWS /*=|*/ &= ~WS_OVERLAPPEDWINDOWlWSEX /*=|*/ &= ~WS_EX_WHATEVERELSE // Add the flags you want.lWS /*=&*/ |= WS_POPUPlWSEX /*=&*/ |= WS_EX_WHATEVERELSE// Set the new styles:SetWindowLong(lWS)SetWindowLong(lWSEX)//Update windowSetWindowPos( )It's what I use to toggle between fullscreen and bordered windows.

The way you had it would do the opposite.

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