Use C / C to extend Python on Windows
How to use Windows DLL in Python
First download the CTYPES module
Description at http://starship.python.net/crew/theller/ctypes/reference.html
Here is an example I wrote.
First write a DLL, the source code is as follows
#include
#include
/ / ---------------------------------------
/ / Demo use DLL
/ / ---------------------------------------
INT apientry __declspec (dllexport) addnum1 (int A) {
Return (A 1);
}
Int apientry __declspec (dllexport) AddNum10 (INT A, CHAR * CA) {
Sprintf (CA, "% D", A 10);
Return (A 10);
}
Compile with BCC 5.5
BCC -TWD DLL.C
This is called in Python as follows:
From CTypes IMPORT *
Filename = "dll.dll"
Func = WINDLL.LOADLIBRARY (FileName)
A = c_int (2) #Convert to C Type
Ret = c_int ()
Ret = func.addnum1 (a)
Print "Value of A:", RET
B = C_INT (20)
Str = c_char_p ("") #char point
RET = Func.AddNum10 (B, STR)
Print "Return Value IS:", RET
Print "The string is:", Str.Value
# WINDLL.FREELIBRARY (FUNC)
Output result
Value of A: 3
Return Value IS: 30
THE STRING IS: 30
