Try

IF MDOWN()

>I have code in a textbox's lostfocus that moves the cursor to the next row same column when the user leaves the current control. However, I need to prevent this happening when the user uses the mouse to click outside (leave) the control. How can I trap for the mouse and cause a dodefault() in the lostfocus?
>
>
>COLUMN1.TEXT1.LOSTFOCUS:
>

>* I want dodefault for when the mouse is used to leave the control
>* by clicking on another control or row.
>nkeycode = LASTKEY()
>IF (!INLIST(nkeycode, 5, 15))
>	NODEFAULT
>	WITH THISFORM.GRID
>		SKIP IN (.RECORDSOURCE)
>	ENDWITH
>	IF THISFORM.nrow > 0
>		THISFORM.GRID.ACTIVATECELL( THISFORM.nrow + 1, 3)
>	ENDIF
>ELSE
>	DODEFAULT()
>ENDIF
>