TESCOM.DLL

Rigane Mohamed

hello!

I could not add the file 'TESCOM.DLL' as a reference "Can not add a reference to the file specified" with VB6 and C #, knowing that this dll was built to run with Windows 95 or Windows NT.

and also I have the source code. c and. h which are the dll but I do not know how to build the dll.

and thank you in advance.

3 Replies

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Sam Hobbs15y ago
How is VB6 relevant? I think you left something critical out.
Rigane Mohamed15y ago
Finally, I could move a bit:

*** The dll is unmanaged (native c++) :

1. right-click the "project" icon in solution explorer
2. click "Add" -> "Existing Item"
3. browse and select the dll (you will have to change the "file type" combo-box to be able to see it)
4. click the dll in solution explorer
5. in the properties pane change the "Copy to Output Directory" property to "Copy if newer" - to make sure the dll is copied to the debug/release directory upon compilation.
6. to access methods on the dll - you will have to use something like [DllImport("User32.dll")] - see documentation about "DllImport" to learn how to "Marshal" (connect, bridge) native methods and data types into .Net methods and data types.

how I can translate these steps in VB6?
Sam Hobbs15y ago
If the souce code has the c extension not cpp then it is nearly certainly a C program not C++. If it is a C program then you cannot add it as a reference since that requires managed code and C is not capable of using managed code. The DLL might be a COM object but if not then you need to use pinvoke to call the DLL.