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Help with functions

Posted on 1998-08-05
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Last Modified: 2010-04-04
I must be missing something simple. I add the the following function to unit1.pas:

function CheckPath(s: String): String;
begin
if (AnsiLastChar(s) = '\') then
CheckPath := Copy(s,1,Length(s) - 1)
Else
CheckPath := s;
end;

when i try to do s := CheckPath(DirectoryListBox1.Directory) in a procedure I get:

[Error] Unit1.pas(49): Undeclared identifier: 'CheckPath'

What am I missing?
0
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Question by:LostOne
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2 Comments
 
LVL 2

Accepted Solution

by:
kjteng earned 200 total points
ID: 1359919
Lets say the unit contain the checkpath function is called UnitZ.

There are few possiblities:
1. If you are calling the function from other unit (say unit1), you have to: [a] add the word unitZ in the uses clause of unit1 [b] declare the checkpath function in the Interface Section of unitZ.
2. If you just want to call the checkPath function within unitZ only, then you do not need to declare it in the interface section. However, the code for this function must come before you called it. ie

implementation

function CheckPath(s: String): String;
begin
  ...
end;

procedure Tform1.ABC;
var s: string;
begin
  .....
  s := CheckPath(DirectoryListBox1.Directory)
end;

.


BUT NOT

implementation

procedure Tform1.ABC;
var s: string;
begin
  .....
  s := CheckPath(DirectoryListBox1.Directory)
end;

function CheckPath(s: String): String;
begin
  ...
end;

.
0
 

Author Comment

by:LostOne
ID: 1359920
Thanks, the function came after the procedure I was trying to use it in. Doesn't make a difference is VB so I didn't even think aobut that.

Thanks.
0

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