VC动态调用DLL

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

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

#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;
}