/// <summary>
/// Gets an Icon based upon the progId of a particular application
/// </summary>
/// <param name="progId">The progId for which is locate the Icon</param>
/// <returns>The appropriate default Icon</returns>
public static Icon GetIconFromProgId(string progId)
{
if (progId == null || !m_icons.ContainsKey(progId))
{
IntPtr hInstance = Marshal.GetHINSTANCE(typeof(AppIconCache).Module);
string IconPath = GetDefaultIconPath(progId);
if (IconPath != null)
{
string[] iconInfo = IconPath.Split(',');
IntPtr hIcon = Shell32.ExtractIcon(hInstance, iconInfo[0], Convert.ToInt32(iconInfo[1]));
Icon icon = Icon.FromHandle(hIcon);
if (progId == null)
{
return(icon);
}
m_icons[progId] = icon;
}
else
{
if (progId == null)
{
return(null);
}
m_icons[progId] = null;
}
}
return((Icon)m_icons[progId]);
}
public static Icon ShellExtractIcon(string path, int iconIndex = 0)
{
IntPtr iconHandle = IntPtr.Zero;
try
{
return(Icon.FromHandle(Shell32.ExtractIcon(Process.GetCurrentProcess().Handle, path, iconIndex)));
}
finally
{
User32.DestroyIcon(iconHandle);
}
}
public static ImageSource GetIconAsImageSourceFromFile(string path, int iconIndex = 0)
{
IntPtr iconHandle = IntPtr.Zero;
try
{
iconHandle = Shell32.ExtractIcon(Process.GetCurrentProcess().Handle, path, iconIndex);
return(Imaging.CreateBitmapSourceFromHIcon(iconHandle, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()));
}
finally
{
User32.DestroyIcon(iconHandle);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="RenderForm" /> class.
/// </summary>
/// <param name="windowTitle"> (Optional) The window title. </param>
/// <exception cref="Win32Exception"> Thrown when a Window 32 error condition occurs. </exception>
public RenderForm(string windowTitle = "RenderForm")
{
_windowTitle = windowTitle;
_rawKeyPipe = new Pipe <RawKeyEventHandler>();
_keyUpPipe = new Pipe <KeyEventHandler>();
_keyDownPipe = new Pipe <KeyEventHandler>();
_keyPressPipe = new Pipe <KeyPressEventHandler>();
_mouseMovePipe = new Pipe <MouseEventHandler>();
_mouseUpPipe = new Pipe <MouseEventHandler>();
_mouseDownPipe = new Pipe <MouseEventHandler>();
_mouseClickPipe = new Pipe <MouseEventHandler>();
_mouseWheelPipe = new Pipe <MouseEventHandler>();
_mouseRawInputPipe = new Pipe <MouseEventHandler>();
_wndClassEx = new WndClassEx
{
cbSize = Marshal.SizeOf <WndClassEx>(),
style = ClassStyles.HorizontalRedraw | ClassStyles.VerticalRedraw |
ClassStyles.DoubleClicks | ClassStyles.OwnDC,
hbrBackground = (IntPtr)COLOR_WINDOW + 1, //null,
cbClsExtra = 0,
cbWndExtra = 0,
hInstance = Kernel32.GetModuleHandle(null !),
hIcon = Shell32.ExtractIcon(IntPtr.Zero, Assembly.GetExecutingAssembly().Location, 0),
hCursor = User32.LoadCursor(IntPtr.Zero, IDC_ARROW),
lpszMenuName = null !,
lpszClassName = LP_CLASS_NAME,
lpfnWndProc = WndProc,
hIconSm = IntPtr.Zero
};
ushort regResult = User32.RegisterClassEx(ref _wndClassEx);
if (regResult == 0)
{
throw new Win32Exception(
Kernel32.GetLastError(), $"{nameof(User32.RegisterClassEx)} failed with code {regResult}!");
}
}