public static long SendMsg(string str, System.IntPtr desthandle, System.IntPtr sourcehandle, int type, int timeout)
{
if ((desthandle == IntPtr.Zero) || (sourcehandle == IntPtr.Zero))
{
return(-1); // fail on invalid handles
}
WMUtil.COPYDATASTRUCT cds = new WMUtil.COPYDATASTRUCT();
cds.dwData = (IntPtr)type;
str = str + '\0';
cds.cbData = str.Length + 1;
System.IntPtr pData = Marshal.StringToCoTaskMemAnsi(str);
cds.lpData = pData;
IntPtr res = IntPtr.Zero;
IntPtr err = WMUtil.SendMessageTimeout(desthandle, (uint)WM_COPYDATA, (IntPtr)sourcehandle, IntPtr.Zero, SendMessageTimeoutFlags.SMTO_NORMAL, (uint)timeout, out res);
if (err == IntPtr.Zero)
{
return(0);
}
Marshal.FreeCoTaskMem(pData);
return(res.ToInt64());
}