/// <summary>
/// Sends the MSG.
/// </summary>
/// <param name="str">The STR.</param>
/// <param name="desthandle">The desthandle.</param>
/// <param name="sourcehandle">The sourcehandle.</param>
/// <param name="type">The type.</param>
/// <returns></returns>
public static long SendMsg(string str, System.IntPtr desthandle, System.IntPtr sourcehandle, int type)
{
if ((desthandle == IntPtr.Zero) || (sourcehandle == IntPtr.Zero))
{
return(-1); // fail on invalid handles
}
WMUtil.COPYDATASTRUCT cds = new WMUtil.COPYDATASTRUCT();
cds.dwData = type;
str = str + '\0';
cds.cbData = str.Length + 1;
System.IntPtr pData = Marshal.AllocCoTaskMem(str.Length);
pData = Marshal.StringToCoTaskMemAnsi(str);
cds.lpData = pData;
IntPtr res = WMUtil.SendMessage(desthandle, WMUtil.WM_COPYDATA, (int)sourcehandle, ref cds);
Marshal.FreeCoTaskMem(pData);
return(res.ToInt64());
}