c++builder调用dll

// 定义
typedef int __stdcall MyFunction (int x, char *str);

int rtn = 0;
String dllName = "XXXX.dll";
HINSTANCE hInstance = LoadLibrary(dllName.c_str());
MyFunction * pMyFunction = (MyFunction*) GetProcAddress(hInstance, "rdcompany"); // 函数名称要正确
if (pMyFunction == NULL)
{
// 提示
}

rtn = pMyFunction(1, "aa");
FreeLibrary(hInstance);
hInstance = NULL;