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Passing PChar to DLL

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

adam_pedley

ASKER

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

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ASKER CERTIFIED SOLUTION

prakash_prk

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prakash_prk

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adam_pedley

ASKER

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