Calling functions from imported Dll in test complete

Does Core.dll belong to TestComplete or is this something you or someone else has developed?

It doesn't belong to Test Complete. Iam trying to import and access those functions

What you've done, is correct -

1. You've defined the DLL type. 
2. You've defined the Parameter type
3. You need to declare the Function type e.g. Def_DLL.DefineProc("NavigateTo", vt_string)
4. You've loaded the DLL in memory
5. Now you need to call the Function i.e. Lib.NavigateTo("")

Refer to https://support.smartbear.com/testcomplete/docs/testing-with/advanced/using-external-functions/calling-from-dll/index.html and the examples.

Hello, PrathyushaCH

To call a method from an imported DLL in TestComplete using C#, you'll need to ensure that you correctly define and invoke the method. Here’s a structured approach to help you access the NavigateTo method from Core.dll.

Step-by-Step Guide
Define the DLL: Make sure you properly define the DLL and the function signature you intend to call.

Load the DLL: Ensure you load the DLL correctly. Use the DLL.Load method to reference the DLL.

Define the Function: You need to define the function you want to call from the DLL correctly. The parameters and return types must match the definitions in the DLL.

Example Code
Here’s an example that outlines how to do this:

function callDll() {
    // Load the DLL
    var lib = DLL.Load("C:\\auto\\ExternalLibraries\\Core.dll");

    // Check if the DLL was loaded successfully
    if (lib == null) {
        Log.Error("Failed to load DLL");
        return;
    }

    // Define the NavigateTo method from the DLL
    var navigateTo = DLL.DefineFunction(lib, "NavigateTo", vt_string, [vt_string]); // Adjust parameter types as needed

    // Call the NavigateTo method
    var result = navigateTo("YourParameterHere"); // Replace with actual parameter

    // Log the result
    Log.Message("Result from NavigateTo: " + result);

    // Unload the DLL if necessary (optional)
    DLL.Unload(lib);
}

Key Points:
DefineFunction: Make sure that the function signature matches what is defined in the DLL. The types (vt_string, etc.) need to be accurate.
Parameter Types: Update the vt_string in the DefineFunction method with the correct parameter types according to the function definition in Core.dll.
Error Handling: Always check if the DLL is loaded successfully and handle errors gracefully.
Logging: Utilize logging to check if your calls are successful and to debug issues.

Debugging Tips:
Ensure that Core.dll is accessible at the specified path.
Verify that the NavigateTo method exists in the DLL and that its signature matches what you're trying to define in TestComplete.
Check the TestComplete documentation for any specific notes on using DLLs and calling external functions.
Best regards,
JennieF
NYStateofHealth

" DLL.DefineFunction", This is not populating in Test complete. Is DefineFunction a valid function in Test complete?

This link is not helping me with my scenario, Refer to https://support.smartbear.com/testcomplete/docs/testing-with/advanced/using-external-functions/calling-from-dll/index.html and the examples.

Can someone please provide me with the solution