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Passing PChar to DLL

Posted on 2004-09-02
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Last Modified: 2006-11-17
Hi

I have a DLL that was created in Delphi. I am using vb to call a function in this DLL.

The function asks for PChar of the filename that it will use. I pass a string to the DLL and the DLL brings up a window and says uploading file c to destination when the string i entered was c:\test.txt. It only gets the first character.

Here is the source code i have used
Public Declare Auto Function UploadKill Lib "C:\Program Files\EasyCheck\EasySyncLib.dll" Alias "UploadKillFile" (ByVal Filename As String, ByVal userid As String, ByVal pword As String, ByVal status As String, ByVal maxlength As Integer) As String

and then

dim str as String = "c:\test.txt"
UploadKill(str, "", "", "", 255)

and yes i have tried byRef filename as string

thanks
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Question by:adam_pedley
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4 Comments
 
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Author Comment

by:adam_pedley
ID: 11961603
Solved the problem

Public Declare Auto Function UploadKill Lib "C:\Program Files\EasyCheck\EasySyncLib.dll" Alias "UploadKillFile" (ByVal Filename As String, ByVal userid As String, ByVal pword As String, ByVal status As String, ByVal maxlength As Integer) As String

Changed the auto to ansi and it worked

its always a small change that makes a big difference

First person to say hello on this question gets the 500 points
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Accepted Solution

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prakash_prk earned 2000 total points
ID: 11961652
hello
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LVL 10

Expert Comment

by:prakash_prk
ID: 11961653
Please deleted the question . post a request to community support .
Don't give points to anyone
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LVL 4

Author Comment

by:adam_pedley
ID: 11961669
put i want to keep this question up, so that if other people have the same problem they can see my solution

i'm on premium services anyway, so i have unlimited points
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