LoadLibrary

LoadLibrary是计算机语法

LoadLibrary详细介绍

LoadLibrary是计算机语法

LoadLibrary语法

Syntax（C++）

HMODULE WINAPI LoadLibrary( _In_ LPCTSTR lpFileName);

LoadLibrary声明

VB6:

Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long

VB.NET

Declare Unicode Function LoadLibrary Lib "kernel32" Alias "LoadLibraryW" (lpLibFileName As String) As IntPtr

LoadLibrary说明

载入指定的动态链接库，并将它映射到当前进程使用的地址空间。一旦载入，即可访问库内保存的资源

LoadLibrary返回值

Long，成功则返回库模块的句柄，零表示失败。会设置GetLastError

参数 类型及说明

lpLibFileName String，指定要载入的动态链接库的名称。采用与CreateProcess函数的lpCommandLine参数指定的同样的搜索顺序

注解

一旦不需要，用FreeLibrary函数释放DLL

LoadLibraryVB6实例

Create a new project and add this code to Form1

Private Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long

Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long

Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long

Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Any, ByVal wParam As Any, ByVal lParam As Any) As Long

Private Sub Form_Load()

On Error Resume Next

'KPD-Team 1999

'We're going to call an API-function, without declaring it!

Dim lb As Long, pa As Long

'map 'user32' into the address space of the calling process.

Lb = LoadLibrary("user32")

'retrieve the address of 'SetWindowTextA'

pa = GetProcAddress(lb, "SetWindowTextA")

'Call the SetWindowTextA-function

CallWindowProc pa, Me.hWnd, "Hello !", ByVal 0&, ByVal 0&

'unmap the library's address

FreeLibrary lb

End Sub