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Help => Graphics => Topic started by: nbd on February 21, 2014, 03:31:03 pm

Title: Error "WGL Message" on exit
Post by: nbd on February 21, 2014, 03:31:03 pm

I have a simple test application which does nothing except of creating a new Render window from an existing HWND with the following statement:

Code: [Select]

m_pRendWnd = new sf::RenderWindow( hWnd );
On exit the render window is destroyed as follows:

Code: [Select]

if ( m_pRendWnd ) {
m_pRendWnd->setActive(false);
m_pRendWnd->close();
delete m_pRendWnd;
}
When I start this program and close it, the debugger shows the following message:

Quote

WGL Message:WGL: DDraw: UpdateClipList: GetClipList (1): DDERROR = DDERR_GENERIC

WGL Message:WGL: DDraw: UpdateClipList: GetClipList (2): DDERROR = DDERR_GENERIC

WGL Message:System Error: (1114):dettachMessageHook

Why this message is displayed?

Title: Re: Error "WGL Message" on exit
Post by: Laurent on February 21, 2014, 04:15:28 pm

Where does the HWND come from? How was that window created?

Title: Re: Error "WGL Message" on exit
Post by: nbd on February 21, 2014, 06:06:27 pm

This is a basic standard Windows application and with a single main window created with

Code: [Select]

hWnd = CreateWindow(
szWindowClass,
szTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
0,
1000 + (GetSystemMetrics(SM_CXFRAME) * 2), // Initial window width
1000 + (GetSystemMetrics(SM_CYFRAME) * 2) +
GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CYMENU), // Initial height
NULL,
NULL,
hInstance,
NULL);
The destruction of SFML RenderWindow is called before calling DestroyWindow(hWnd); for the main (and single) hWnd for which RenderWindow was created.