Help How to write vb code

Hi guys
I am trying to write a bit of code
If a button is pressed then copy c:\ Data_lineb to d: (USB)
I am using rsview32 visual basic, can anyone help
I am new to vb and review32

Something like
Dim DestFile as string
DestFile = "d:Yourfilename"
if ButtonPressed then
'delete if already present
If FileExists(destFile) Then Kill DestFile
FileCopy "c:\ Data_lineb", DestFile
EndIf

That's for VB6, but it should be similar

i have found this in the help file in rsview32 vba
but it pops up with an error sub? and highlights dim c: data_line6 can anyone help thanks stu
If OPENFILE_COPY = 1 Then 'BUTTON TAG NAME
Dim C: DATA_LINE6 , D: DATA_LINE6
SourceFile = "C DATA_LINE6" ' .
DestinationFile = "D: DATA_LINE6" ' Define target file name.
FileCopy C: DATA_LINE6 , D: DATA_LINE6 ' Copy source to target.
End Sub

Stu's code is fine but will crash if the file D: DATA_LINE6 exists

That's why I have in mine
If FileExists(destFile) Then Kill DestFile
(FileExists is a function that you can find easily on the web)