C# Signature:

[DllImport("shell32.dll")]
static extern bool Shell_NotifyIcon(uint dwMessage,
   [In] ref NOTIFYICONDATA pnid);

User-Defined Types:

Here's the data structure for the NotifyIconData block, contributed by staff at http://www.softswift.com

    [StructLayout(LayoutKind.Sequential)]
    public struct NotifyIconData
    {
        public System.Int32 cbSize; // DWORD
        public System.IntPtr hWnd; // HWND
        public System.Int32 uID; // UINT
        public NotifyFlags uFlags; // UINT
        public System.Int32 uCallbackMessage; // UINT
        public System.IntPtr hIcon; // HICON
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)]
        public System.String szTip; // char[128]
        public System.Int32 dwState; // DWORD
        public System.Int32 dwStateMask; // DWORD
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=256)]
        public System.String szInfo; // char[256]
        public System.Int32 uTimeoutOrVersion; // UINT
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=64)]
        public System.String szInfoTitle; // char[64]
        public System.Int32 dwInfoFlags; // DWORD
        //GUID guidItem; > IE 6
    }

Notes:

None.

Tips & Tricks:

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Sample Code:

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Alternative Managed API:

System.Windows.Forms.NotifyIcon

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