| VB声明 | |
| Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long | |
| 说明 | |
| 寻找窗口列表中第一个符合指定条件的顶级窗口(在vb里使用:FindWindow最常见的一个用途是获得ThunderRTMain类的隐藏窗口的句柄;该类是所有运行中vb执行程序的一部分。获得句柄后,可用api函数GetWindowText取得这个窗口的名称;该名也是应用程序的标题) | |
| 返回值 | |
| Long,找到窗口的句柄。如未找到相符窗口,则返回零。会设置GetLastError | |
| 参数表 | |
| 参数 | 类型及说明 |
| lpClassName | String,指向包含了窗口类名的空中止(C语言)字串的指针;或设为零,表示接收任何类 |
| lpWindowName | String,指向包含了窗口文本(或标签)的空中止(C语言)字串的指针;或设为零,表示接收任何窗口标题 |
| 注解 | |
|
很少要求同时按类与窗口名搜索。为向自己不准备参数传递一个零,最简便的办法是传递vbNullString常数 | |
Sendmessage
| VB声明 | |
| Declare Function SendMessage& Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) Declare Function SendMessageBynum& Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) Declare Function SendMessageByString& Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As String) | |
| 说明 | |
| 调用一个窗口的窗口函数,将一条消息发给那个窗口。除非消息处理完毕,否则该函数不会返回。SendMessageBynum, SendMessageByString是该函数的“类型安全”声明形式 | |
| 返回值 | |
| Long,由具体的消息决定 | |
| 参数表 | |
| 参数 | 类型及说明 |
| hwnd | Long,要接收消息的那个窗口的句柄 |
| wMsg | Long,消息的标识符 |
| wParam | Long,具体取决于消息 |
| lParam | Any,具体取决于消息 |
getdlgitem
| VB声明 | |
| Private Declare Function GetDlgItem Lib "user32" Alias "GetDlgItem" (ByVal hDlg As Long, ByVal nIDDlgItem As Long) As Long | |
| 说明 | |
| 用来得到一个窗体子窗体的句柄,如一个按钮等 | |
| 参数表 | 类型及说明 |
| hwnd | 父窗体的句柄 |
| niddlgitem | 子窗体的ID号码 |
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