assembly Language

This is a program using the STDCALL calling convention clean up the stack. I don't understand why the first parameter need to stored at location ebp+8. Please help me. Thank you!

The cleanup using the STDCALL Calling Convention involves removal of all the used local variables and other parameters from the stack It is done using an integer value; equal to the number of bytes used by the procedure; appended to the RET statement. After the RET returns to the address of calling procedure; this integer value is added to the value of EBP that cleanup the stack. The following code segment illustrates it: MyProc PROC push ebp mov ebp,esp; assign the stack location to ; EBP mov ebx,[ebp+8]; first parameter stored at ; location ebp+8 sub ebx.lebpt4): second parameter stored at location ebp+4 pop ebp ret 8; 4-bytes for each parameter MyProc ENDP Here note that the storage of EBP does not add bytes onto the integer value