Dynamic-Link Library Functions--动态链接库函数

GetModuleHandle

The GetModuleHandle function returns a module handle for the specified module if the file has been mapped into the address space of the calling process. （如果文件被映射到进程中）
原型：
HMODULE GetModuleHandle(
LPCTSTR lpModuleName // address of module name to return handle
// for
);

GetProcAddress

The GetProcAddress function returns the address of the specified exported dynamic-link library (DLL) function.

FARPROC GetProcAddress(
HMODULE hModule, // handle to DLL module
LPCSTR lpProcName // name of function
);

LoadLibrary

The LoadLibrary function maps the specified executable module into the address space of the calling process. (加载指定的可执行模块到进程空间)

HINSTANCE LoadLibrary(
LPCTSTR lpLibFileName // address of filename of executable module
);

FreeLibrary

The FreeLibrary function decrements（递减） the reference count of（引用计数） the loaded dynamic-link library (DLL) module. When the reference count reaches（达到） zero, the module is unmapped from the address space of the calling process and the handle is no longer valid. (到达0就不在映射到进程的地址空间并且这个句柄不再有效)

BOOL FreeLibrary(
HMODULE hLibModule // handle to loaded library module
);