How to use .DLL with VB???

I have a very simple DLL that contain 5 routines.

1) What do I have to do to make this DLL available to Visual Basic??

2) What do I need to do to register this DLL with Windows, or do I???

I tried a few things, but I keep getting an Error saying "FILE NOT FOUND" and it referes to the below line in my declarations:

Private Declare Sub trInfo Lib "trackw" (rev%)

I have also tried it this way:

Private Declare Sub trInfo Lib "c:\windows\trackw.dll" (rev%)

Is this case sensitive??? I am lost?!?!?!


thanks for the help.

You have to register it first. The best place to put it is in the System32 folder. Anyways then open a command prompt and type 'regsvr32 nameoffile' if you put it in system32 folder or 'regsvr32 [pathtofile]' if not. This will allow you to reference it from references in VB.

You register COM servers, not regular dll's

If you wrote the dll in VB it is a COM object, so you have to register it. Otherwise, Put the file in c:\Windows\System directory

A regular dll callyou declare it like this

Declare Function PrinterProperties Lib "somthin" (ByVal hWnd As Long, ByVal hPrinter As Long) As Long


"somthin" points to \windows\system\somthin.dll

Thanks! I was pretty sure I had to register it or something.

I tried to use the service to register though, and I got this message:

LoadLibrary("trackw.dll") failed.
GetLastError returns 0x0000001f.

This DLL was written for Win 3.1... does that matter??? What would need to be changed??

I was hoping since it was so simple that no changes would be necessary, but it looks like they might be!


Thanks for your excellent help.

It all started as an ASM library add-in for Qbasic and PBasic... but then we made it into a DLL, but I don't know if the DLL is in ASM or C...

I am assuming I can use it, I just am not setting it up properly???

Thanks again... your answers have been more than helpful.

I keep getting the same error:

Runtime error: 48

File Not Found

This is how I have it declared and the file is in the C:\windows\system directory:

Private Declare Sub trInfo Lib "trackw" (rev As Integer)


Is this right??? What am I doing wrong???