When the VC program is running, set the specified directory to read the DLL

Method 1:

Select the current project, right-click
"Properties"-> "configuration properties"-> "debugging ",
Set the dll path in "working directory ".

 

Method 2: set the project environment variables

 

Method 3:

Cstring strdllpath = getexepath () + _ T ("system ");
Setdlldirectory (strdllpath );

 

 

Find the dll Directory order:

If the application uses the loadlibrary explicit link, you can specify the complete path of the DLL file in this function parameter. If you do not specify a path or perform an implicit link, Windows will follow the search order below to locate the DLL:
1. directory containing the EXE file,
2. current working directory of the process,
3. Windows System directory,
4. Windows Directory,
5. A series of directories listed in the PATH environment variable.