確定tb7不是在Public Sub Button7_Click(sender As Object, e As EventArgs) Handles Button7.Click范圍內(nèi)定義。
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首先要添加兩個窗體,假設第一個窗體名為Form1,第二個窗體名為Form2。在Form1窗體中添加個按鈕Command1。按鈕單擊事件的代碼為:
Private Sub Command1_Click()
Form2.Show '用show方法加載并且顯示名為Form2的窗體
End Sub
show 方法后面省略了兩個參數(shù)即Form2.Show 0或Form2.Show 1此參數(shù)可缺省??勺孕羞\行驗證
用API ?GetKeyboardState?,判斷所有的鍵里哪些被按下了。
下面的是判斷鍵盤燈的狀態(tài)
Public?Class?NativeMethods
Private?Shared?keyState()?As?Byte
DllImport("user32.dll")?_
Private?Shared?Function?GetKeyboardState(ByVal?keyState()?As?Byte)?As?Boolean
End?Function
Private?Shared?Sub?Update()
keyState?=?New?Byte(256)?{}
Dim?result?As?Boolean?=?GetKeyboardState(keyState)
'?Check?for?error:
If?result?=?False?Then
Debug.WriteLine("GetKeyBoardState?error:?"??Marshal.GetLastWin32Error)
Throw?New?Exception("GetKeyBoardState?error:?"??Marshal.GetLastWin32Error)
End?If
End?Sub
Public?Enum?LightState
Off
[On]
End?Enum
'?Example?-?the?keyboard?lights...
Public?Shared?ReadOnly?Property?CapsLockState()?As?LightState
Get
Update()
Dim?isOn?As?Boolean?=?(keyState(Keys.CapsLock)?=?1)
Return?IIf(isOn,?LightState.On,?LightState.Off)
End?Get
End?Property
Public?Shared?ReadOnly?Property?NumLockState()?As?LightState
Get
Update()
Dim?isOn?As?Boolean?=?(keyState(Keys.NumLock)?=?1)
Return?IIf(isOn,?LightState.On,?LightState.Off)
End?Get
End?Property
Public?Shared?ReadOnly?Property?ScrollLockState()?As?LightState
Get
Update()
Dim?isOn?As?Boolean?=?(keyState(Keys.Scroll)?=?1)
Return?IIf(isOn,?LightState.On,?LightState.Off)
End?Get
End?Property
End?Class
當前題目:vb點虐
按下按鈕 vb按鈕按下和釋放
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