在Excel 2010中从VBA调用的C ++ DLL仅在管理员模式下工作

Question

I have created a simple dll in Visual Studio 2012 that performs a calculation. I am calling this dll from VBA in Excel 2010 using the following syntax:

Declare Sub MyFunction Lib "MyDll.dll" (ByRef param1 As Double, ByVal param2 As Double)

This function works perfectly on my development machine. When I try to run this dll on another computer, I get the following error:

Run-time error '53': File not found: MyDll.dll

However, when I run Excel (on another computer) in administrator (elevated) mode, I don't get this error and everything works perfectly.

Is there any way I can get this to work without having the user run Excel as an administrator?

Answer 1

From what I can guess your DLL is not in the working directory, PATH variable directory or system directory. Excel is not looking in the directory your DLL is so you need to move your DLL into the system directory, one of the PATH variable directories or excels' working directory.