Here's a bit of documentation errata from the VFP 7.0 docs (haven't checked 6.0). Consider the following:

MESSAGEBOX(eMessageText [, cTitleBarText][, nDialogBoxType ][, nTimeout])

should read

MESSAGEBOX(eMessageText [, nDialogBoxType ][, cTitleBarText][, nTimeout])

This isn't all that big a deal in 7.0 since Intellisense shows it correctly. However, if you're using both 6.0 and 7.0 and bring up 7.0's help in 6.0...

I hope that Garrett Fitzgerald or someone else from MS corrects this.