VC动态调用DLL

1、

//函数指针声明
typedef int (_stdcall MYDLLFUN)(char* _pcOut, /*INOUT*/int *_piOutBufLen, char* _pcIn, int _iInBufLen);

2、

    HINSTANCE hmydll=::LoadLibrary("_DrCompressDll.DLL");
    mydllfun=(MYDLLFUN *)::GetProcAddress(hmydll, "CompressZ");

3、VS2010 动态调用 DLL示例：

#include <stdio.h>
#include <Windows.h>

typedef int (__stdcall *TfnC_ExecJS)( void *_pSvgFrm, char* _pcJS );//定义形式对应的函数指针类型
typedef int (__stdcall *TfnD_PassStId)( void *Sender, char* _pcStId );

#define DLL_NAME "DrRemoteCall.dll"

TfnC_ExecJS g_fnExecJS = NULL;//声明一个函数指针
TfnD_PassStId g_fnPassStId = NULL;

void main()
{
    HINSTANCE hDll = LoadLibraryA(DLL_NAME);
    if(hDll == NULL)
    {
        printf("无法载入dll : %s\n", DLL_NAME);
        FreeLibrary(hDll);
        getchar();
        return;
    }

    g_fnExecJS = (TfnC_ExecJS)GetProcAddress(hDll, "ExecJS");
    if(g_fnExecJS == NULL)
    {
        printf("无法获取函数地址(ExecJS)\n");
        FreeLibrary(hDll);
        getchar();
        return;
    }
    g_fnPassStId = (TfnD_PassStId)GetProcAddress(hDll, "PassStId");
    if(g_fnPassStId == NULL)
    {
        printf("无法获取函数地址(PassStId)\n");
        FreeLibrary(hDll);
        getchar();
        return;
    }

    // 调用函数
    int iRtn = g_fnPassStId(NULL, "TestA");
    printf("PassStId return %d\n", iRtn);

    FreeLibrary(hDll);
    getchar();
    return;
}

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