private static Icon GetWindowIcon(IntPtr handle)
{
if (MessagingMethods.SendMessageTimeout(
handle,
Wm.Geticon,
new IntPtr(0),
new IntPtr(0),
MessagingMethods.SendMessageTimeoutFlags.AbortIfHung | MessagingMethods.SendMessageTimeoutFlags.Block,
500,
out var hIcon) ==
IntPtr.Zero)
{
hIcon = IntPtr.Zero;
}
Icon result = null;
if (hIcon != IntPtr.Zero)
{
result = Icon.FromHandle(hIcon);
}
else
{
//Fetch icon from window class
hIcon = WindowMethods.GetClassLong(handle, WindowMethods.ClassLong.Icon);
if (hIcon.ToInt64() != 0)
{
result = Icon.FromHandle(hIcon);
}
}
return(result);
}
public void RegisterClass_GetSetClassLong()
{
// Some docs claim that 40 is the max, but that isn't true (at least in recent OSes)
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms633574.aspx
WindowClass myClass = new WindowClass
{
ClassName = "RegisterClass_GetSetClassLong",
Style = ClassStyle.HorizontalRedraw,
WindowProcedure = CallDefaultProcedure,
ClassExtraBytes = 80
};
Atom atom = WindowMethods.RegisterClass(ref myClass);
atom.IsValid.Should().BeTrue();
try
{
WindowHandle window = WindowMethods.CreateWindow(atom,
"RegisterClass_GetSetClassLong_Window", WindowStyles.Diabled | WindowStyles.Minimize);
window.IsValid.Should().BeTrue();
try
{
var info = WindowMethods.GetClassInfo(ModuleMethods.GetModuleHandle(null), atom);
info.ClassExtraBytes.Should().Be(80);
IntPtr result = WindowMethods.SetClassLong(window, (ClassLong)72, (IntPtr)0x0000BEEF);
result.Should().Be(IntPtr.Zero);
WindowMethods.GetClassLong(window, (ClassLong)72).Should().Be((IntPtr)0x0000BEEF);
}
finally
{
WindowMethods.DestroyWindow(window);
}
}
finally
{
WindowMethods.UnregisterClass(atom, null);
}
}
public void GetClassLong_GlobalAtom()
{
WindowHandle window = new WindowHandle();
try
{
window = WindowMethods.CreateWindow("bUttOn", "GetClassLong_GlobalAtom", WindowStyles.Diabled | WindowStyles.Minimize);
window.IsValid.Should().BeTrue();
Atom atom = WindowMethods.GetClassLong(window, ClassLong.Atom);
atom.IsValid.Should().BeTrue();
WindowMethods.DestroyWindow(window);
window = WindowMethods.CreateWindow(atom, "GetClassLong_GlobalAtom", WindowStyles.Diabled | WindowStyles.Minimize);
WindowMethods.GetClassName(window).Should().Be("Button");
}
finally
{
if (window.IsValid)
{
WindowMethods.DestroyWindow(window);
}
}
}