SendMessage, SendMessageBynum, SendMessageByString

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

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