public static extern bool InsertMenuItem(
IntPtr hMenu,
uint uItem,
[MarshalAs(UnmanagedType.Bool)]bool fByPosition,
ref MENUITEMINFO mii);
/// <summary>
/// Add commands to a shortcut menu.
/// </summary>
/// <param name="hMenu">A handle to the shortcut menu.</param>
/// <param name="iMenu">
/// The zero-based position at which to insert the first new menu item.
/// </param>
/// <param name="idCmdFirst">
/// The minimum value that the handler can specify for a menu item ID.
/// </param>
/// <param name="idCmdLast">
/// The maximum value that the handler can specify for a menu item ID.
/// </param>
/// <param name="uFlags">
/// Optional flags that specify how the shortcut menu can be changed.
/// </param>
/// <returns>
/// If successful, returns an HRESULT value that has its severity value set
/// to SEVERITY_SUCCESS and its code value set to the offset of the largest
/// command identifier that was assigned, plus one.
/// </returns>
public int QueryContextMenu(
IntPtr hMenu,
uint iMenu,
uint idCmdFirst,
uint idCmdLast,
uint uFlags)
{
// If uFlags include CMF_DEFAULTONLY then we should not do anything.
if (((uint)CMF.CMF_DEFAULTONLY & uFlags) != 0)
{
return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0, 0);
}
// Use either InsertMenu or InsertMenuItem to add menu items.
MENUITEMINFO mii = new MENUITEMINFO();
mii.cbSize = (uint)Marshal.SizeOf(mii);
mii.fMask = MIIM.MIIM_BITMAP | MIIM.MIIM_STRING | MIIM.MIIM_FTYPE |
MIIM.MIIM_ID | MIIM.MIIM_STATE;
mii.wID = idCmdFirst + this.IDM_DISPLAY;
mii.fType = MFT.MFT_STRING;
mii.dwTypeData = this.MenuText;
mii.fState = MFS.MFS_ENABLED;
mii.hbmpItem = this.menuBmp;
if (!NativeMethods.InsertMenuItem(hMenu, iMenu, true, ref mii))
{
int errorCode = Marshal.GetHRForLastWin32Error();
return errorCode;
}
// Add a separator.
MENUITEMINFO sep = new MENUITEMINFO();
sep.cbSize = (uint)Marshal.SizeOf(sep);
sep.fMask = MIIM.MIIM_TYPE;
sep.fType = MFT.MFT_SEPARATOR;
if (!NativeMethods.InsertMenuItem(hMenu, iMenu + 1, true, ref sep))
{
int errorCode = Marshal.GetHRForLastWin32Error();
return errorCode;
}
// Return an HRESULT value with the severity set to SEVERITY_SUCCESS.
// Set the code value to the offset of the largest command identifier
// that was assigned, plus one (1).
return WinError.MAKE_HRESULT(WinError.SEVERITY_SUCCESS, 0,
this.IDM_DISPLAY + 1);
}
