Private Const WM_MYMESSAGE = WM_USER + 1

WinWnd = FindWindow(vbNullString, "SMS Server")
If WinWnd = 0 Then MsgBox "Couldn't find the window ...": Exit Sub
PostMessage WinWnd, WM_MYMESSAGE, 0, "The String"

I checked the lParam and wParam when I intercept the message ans found out that it is a long value.

Is there a way to get my string "The String" back?

Please help.