how do i restrict user not to type more than 5 lines in RTFBox

how do i restrict user not to type more than 5 lines in RTFBox. I am using SendMessage API method (in keypress event), which returns me nos. of line but when i press any key at the end of fifth line, it wrap the last word on sixth line, this is only the problem, otherwise it works fine.

It is very urgent, any help, idea, or clue will be highly obliged. Thanks in advance.
nirmal_4194Asked:
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GrahamSkanRetiredCommented:
Does
Keyascii = 0
not work (as in a standard textbox?)
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nirmal_4194Author Commented:
Yes it works, but by the time the last word jumps to 6th line.

Can you give me coding which you have tested.

Thanks for response.
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GrahamSkanRetiredCommented:
Good point.

This is tested:

Private Sub RTB_Change()
    Do While RTB.GetLineFromChar(Len(RTB.Text)) > 5
        RTB.Text = Left$(RTB.Text, Len(RTB.Text) - 1)
    Loop
End Sub

It needs a loop, because if the user enters a wide character not at the end of the fifth line, then more than one narrow character might be displaced on to the next line.
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nirmal_4194Author Commented:
No it does not work. Please test it again, i am desparately need help.

Thanks for quick response
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GrahamSkanRetiredCommented:
I can find an error, but it is a simple one. The line numbers returned by the function GetLineFromChar() start at 0, so that line number 5 is actually the 6th line.
If you change the 5 to a 4, it will work,  limiting the entry to 5 lines rather than 6 lines, as my original code does.
Because this was so simple, it may be that I haven't understood the problem that you were having with the code. If so can you explain what happens?
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Visual Basic Classic

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