hwnd 是窗口句柄，系統(tǒng)分配的一個(gè)ID號(hào)，對(duì)操作系統(tǒng)來(lái)說(shuō)就是這個(gè)窗口的唯一標(biāo)識(shí),通過(guò)它就可以操作WIN窗口了,LABVIEW VI的前面板無(wú)疑是一個(gè)WINDOWS窗口,那如何獲得這個(gè)窗口句柄那.

有兩種方法:

1.利用API FindWindow函數(shù),通過(guò)窗口標(biāo)題,來(lái)查找前面板的窗口句柄.

2.利用LABVIEW未公開的私有屬性節(jié)點(diǎn)

獲得了HWND,可以說(shuō)獲得了控制前面板的鑰匙,舉幾個(gè)例子:

1.讀取窗口標(biāo)題和設(shè)置窗口標(biāo)題

Public Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long

Public Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long

Public Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String) As Long

2.如何使窗口的最大最小化按紐失效

Public Const GWL_STYLE = (-16)

Public Const WS_MAXIMIZE = &H1000000

Public Const WS_MAXIMIZEBOX = &H10000

Public Const WS_MINIMIZE = &H20000000

Public Const WS_MINIMIZEBOX = &H20000

Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long

總結(jié)

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