Question about exe calling dll

fuyuxiang

A string is output in the dll, and the string is obtained in the exe.
 dll:
   extern "C" _declspec (dllexport) int __stdcall CselectPathShel :: Path (CHAR * path)
{
   .......
}

exe:
 CHAR m_path [260];
 m_path [0] = 0;

 Path (m_path);

The programs in the dll are running normally, but the parameters m_path obtained in the exe are all garbled. After m_path [20] is the string that should be obtained from the dll. What is the problem and how can I change it? ?

rsq666

Debug to see what the first 20 characters of the string are in the DLL.

fuyuxiang

Path "abc" in the dll and m_path "abc" in the exe

rsq666

Then in the EXE, the string is assigned a null value.

fuyuxiang

Every time you run to Path (m_path), there is an interrupted dialog box that pops up, Run-Time Check Failure # 0-The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.

fuyuxiang

I have solved it, my function should be defined in global

creature

Empty string