Reverted WS_EX_LAYERED change

Author: bfiete

BeefySysLib/platform/win/WinBFApp.cpp

@@ -151,10 +151,8 @@ WinBFWindow::WinBFWindow(BFWindow* parent, const StringImpl& title, int x, int y
 		mHMenuMap[aMenu->mMenu] = aMenu;
 		mMenu = aMenu;
 	}
-	
-	// We used to set WS_EX_LAYERED here, but this can cause a very brief flicker of a window frame in the upper left
-	//  corner of the screen. This appears to be a Windows bug. Now we add this flag during SetAlpha
-	int windowFlagsEx = 0;
+		
+	int windowFlagsEx = WS_EX_LAYERED;
 
 	if (windowFlags & BFWINDOW_TOOLWINDOW)
 		windowFlagsEx |= WS_EX_TOOLWINDOW;
@@ -1791,8 +1789,7 @@ void WinBFWindow::SetAlpha(float alpha, uint32 destAlphaSrcMask, bool isMouseVis
 		}
 	}
 	else
-	{
-		::SetWindowLong(mHWnd, GWL_EXSTYLE, ::GetWindowLong(mHWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
+	{		
 		::SetLayeredWindowAttributes(mHWnd, 0, (int) (alpha * 255), LWA_ALPHA);
 	}
 	SetMouseVisible(isMouseVisible);