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[wx] 动态加载 DLL ---- wxDynamicLibrary

2010-08-01 17:11:29| 分类： gui_wxWidgets | 标签： |举报 |字号大中小订阅

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wxWidgets 封装了不少系统API Wrapper Class。

下面看看如何动态加载一个 DLL，并调用其的一个函数。

http://docs.wxwidgets.org/trunk/classwx_dynamic_library.html

注意：要使用 extern "C" 去导出函数，否则 C++ 的 name mangling 会让你头痛的。

-------------------------------------------------------------------------

#include <stdio.h>

#define FOOAPI __declspec(dllexport)

extern "C" {

FOOAPI void myfoo(int val)

{

printf("val = %d\n", val);

}

-------------------------------------------------------------------------

#include <wx/wx.h>

#include <wx/dynlib.h>

#include <windows.h>

typedef void (*FUNC_PTR) (int);

int main()

{

wxDynamicLibrary dl(_("foodll")); // ::LoadLibrary

if ( !dl.IsLoaded() )

return 1;

FUNC_PTR fn = (FUNC_PTR) dl.GetSymbol(_("myfoo")); // ::GetProcAddress

if ( fn )

{

fn(10);

}

return 0;

}

-------------------------------------------------------------------------

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