Hi!
SendMessage parameters are the same both in Win and WinNT:
LRESULT SendMessage(
HWND hWnd, // handle to destination window
UINT Msg, // message
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
Are you sure that problem in SendMessage()? Have you checked return value?
Your param1 = 274 seems to be WM_SYSCOMMAND message, but I can't find system command with -4078 code. SC_MOVE = -4080.

>I have in my base form class the following code in MouseDown() method:
>
>

>IF nButton = 1 AND oApp.EasyMove
>*!*	Obtin handle-ul ferestrei pe care am facut click, dar numai in cazul
>*!*	in care utilizatorul si-a activat aceasta facilitate.
>	DECLARE INTEGER GetFocus IN WIN32API
>	lnHandle = GetFocus()
>	param1 = 274
>	param2 = -4078
>	DECLARE INTEGER ReleaseCapture IN WIN32API
>	DECLARE INTEGER SendMessage IN WIN32API INTEGER, INTEGER, INTEGER, INTEGER
>	bb=ReleaseCapture()
>	bb=SendMessage(lnHandle, param1, param2,0)
>ENDIF
>

>
>This code enables an "easy-move" feature for forms. If oApp.EasyMove is .T., then the form can be moved by clicking anywhere on the form's body.
>
>I have one big problem whith this. It doesn't work under WinNT family. Can anyone enlighten what are the correct parameters for WinNT? Or, at least, where to search for info?