How to remove icon and add ? button in wpf window? - wpf

Question

I have separate code of both one for remove icon and one for add '?'(help) button. but can anyone help me to do both.
my code is below.
[DllImport("user32.dll")]
static extern uint GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
static extern int SetWindowLong(IntPtr hwnd, int index, uint newStyle);
[DllImport("user32.dll")]
static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,
int x, int y, int width, int height, uint flags);
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg,
IntPtr wParam, IntPtr lParam);
const int GWL_EXSTYLE = -20;
const int WS_EX_DLGMODALFRAME = 0x0001;
const int WM_SETICON = 0x0080;
private const uint WS_EX_CONTEXTHELP = 0x00000400;
private const uint WS_MINIMIZEBOX = 0x00020000;
private const uint WS_MAXIMIZEBOX = 0x00010000;
private const int GWL_STYLE = -16;
private const int SWP_NOSIZE = 0x0001;
private const int SWP_NOMOVE = 0x0002;
private const int SWP_NOZORDER = 0x0004;
private const int SWP_FRAMECHANGED = 0x0020;
private const int WM_SYSCOMMAND = 0x0112;
private const int SC_CONTEXTHELP = 0xF180;
The below code is remove icon.
public static void RemoveIcon(Window window)
{
IntPtr hwnd = new WindowInteropHelper(window).Handle;
// Change the extended window style to not show a window icon
uint extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_DLGMODALFRAME | WM_SETICON);
// Update the window's non-client area to reflect the changes
SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE |
SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
}
This function is for add help icon
public static void AddHelpIcon(Window window)
{
IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(window).Handle;
uint styles = GetWindowLong(hwnd, GWL_STYLE);
styles &= 0xFFFFFFFF ^ (WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
SetWindowLong(hwnd, GWL_STYLE, styles);
styles = GetWindowLong(hwnd, GWL_EXSTYLE );
styles |= WS_EX_CONTEXTHELP;
SetWindowLong(hwnd, GWL_EXSTYLE, styles | WS_EX_DLGMODALFRAME | WM_SETICON);
SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
((HwndSource)PresentationSource.FromVisual(window)).AddHook(HelpHook);
}
private static IntPtr HelpHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == WM_SYSCOMMAND &&
((int)wParam & 0xFFF0) == SC_CONTEXTHELP)
{
MessageBox.Show("help");
handled = true;
}
return IntPtr.Zero;
}
So can anybody help me for doing both of them in a windows.

Answer 1

I'm using a Telerik window which is best for that. Please try it.