求VB.net 制作的軟鍵盤“屏幕鍵盤”

我現(xiàn)在沒有現(xiàn)成的代碼給你，不過可以給你一些建議。如果你想在同一進(jìn)程內(nèi)實(shí)現(xiàn)屏幕鍵盤，則你只需要再F2打開的時候，將F1的當(dāng)前焦點(diǎn)控件對象作為參數(shù)，傳遞給F2窗體，在F2點(diǎn)擊屏幕控件時，設(shè)置該“控件.Text = 鍵值” 即可，這種我稱之為假屏幕鍵盤。如果你想跨進(jìn)程實(shí)現(xiàn)屏幕鍵盤，就比較難些了（比如：你想用你的F2窗體上的按鍵，實(shí)現(xiàn)QQ聊天內(nèi)容的輸入、記事本內(nèi)容的輸入）。這個需要用到 “鍵盤鉤子”技術(shù)，有關(guān)這方面的資料，你不妨自己找找。 另外，你提的F2焦點(diǎn)老處理不好，我認(rèn)為F2根本不需要焦點(diǎn)控件（不要用按鈕做控件，而實(shí)用Label或圖片就可以了。）

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vb如何調(diào)用軟鍵盤

VB中利用shell調(diào)用系統(tǒng)的軟鍵盤

以XP SP3為例:

Shell "C:\WINDOWS\system32\osk.exe",1

vb.net中如何執(zhí)行鍵盤事件？

執(zhí)行鍵盤事件方法如下：

第一步，點(diǎn)擊VS工具。

第二步，打開后，新建一個Windows窗體應(yīng)用程序。

第三步，請看右下方Form的屬性欄。

第四步，雙擊KeyDown。

第五步，輸入提示按鍵代碼，如圖所示。

第六步，再次輸入代碼，設(shè)置屬性KeyPreview為true。

第七步，運(yùn)行程序，按下舉例F5，則會彈出提示，表明已經(jīng)成功獲。

在VB.NET中如何實(shí)現(xiàn)鍵盤上兩個鍵長按！在線等~~

長按你可以用計(jì)時器來實(shí)現(xiàn)啊，寫個例子：

Private blCtrl As Boolean = False

Private Sub Form1_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown

If e.KeyCode = Keys.LControlKey Then blCtrl = True

End Sub

Private Sub Form1_KeyUp(sender As Object, e As KeyEventArgs) Handles Me.KeyUp

If e.KeyCode = Keys.LControlKey Then blCtrl = False

End Sub

然后你可以在計(jì)時器里檢測blCtrl的狀態(tài)來確定，不知道你的具體情況是什么樣的

總之是用一個布爾變量來記錄按鍵狀態(tài)，配合計(jì)時器來達(dá)到你想要的功能

VB制作軟鍵盤

用API keybd_event來模擬按鍵過程，但是Ctrl+Alt+Del不能模擬，前面已經(jīng)定義了各個按鍵的值，需要按什么鍵替換成對應(yīng)的值就行了，由于是模擬鍵盤按鍵，所以按鍵發(fā)送的對象是當(dāng)前激活的窗口。

Option Explicit

'

'Virtual Keys, Standard Set

'

Private Const VK_LBUTTON = H1

Private Const VK_RBUTTON = H2

Private Const VK_CANCEL = H3

Private Const VK_MBUTTON = H4 'NOT contiguous with L RBUTTON

Private Const VK_BACK = H8

Private Const VK_TAB = H9

Private Const VK_CLEAR = HC

Private Const VK_RETURN = HD

Private Const VK_SHIFT = H10

Private Const VK_CONTROL = H11

Private Const VK_MENU = H12

Private Const VK_PAUSE = H13

Private Const VK_CAPITAL = H14

Private Const VK_KANA = H15

Private Const VK_HANGEUL = H15 'old name - should be here for compatibility

Private Const VK_HANGUL = H15

Private Const VK_JUNJA = H17

Private Const VK_FINAL = H18

Private Const VK_HANJA = H19

Private Const VK_KANJI = H19

Private Const VK_ESCAPE = H1B

Private Const VK_CONVERT = H1C

Private Const VK_NONCONVERT = H1D

Private Const VK_ACCEPT = H1E

Private Const VK_MODECHANGE = H1F

Private Const VK_SPACE = H20

Private Const VK_PRIOR = H21

Private Const VK_NEXT = H22

Private Const VK_END = H23

Private Const VK_HOME = H24

Private Const VK_LEFT = H25

Private Const VK_UP = H26

Private Const VK_RIGHT = H27

Private Const VK_DOWN = H28

Private Const VK_SELECT = H29

Private Const VK_PRINT = H2A

Private Const VK_EXECUTE = H2B

Private Const VK_SNAPSHOT = H2C

Private Const VK_INSERT = H2D

Private Const VK_DELETE = H2E

Private Const VK_HELP = H2F

'VK_0 thru VK_9 are the same as ASCII '0' thru '9' (=H30 - =H39)

'VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (=H41 - =H5A)

Private Const VK_LWIN = H5B

Private Const VK_RWIN = H5C

Private Const VK_APPS = H5D

Private Const VK_NUMPAD0 = H60

Private Const VK_NUMPAD1 = H61

Private Const VK_NUMPAD2 = H62

Private Const VK_NUMPAD3 = H63

Private Const VK_NUMPAD4 = H64

Private Const VK_NUMPAD5 = H65

Private Const VK_NUMPAD6 = H66

Private Const VK_NUMPAD7 = H67

Private Const VK_NUMPAD8 = H68

Private Const VK_NUMPAD9 = H69

Private Const VK_MULTIPLY = H6A

Private Const VK_ADD = H6B

Private Const VK_SEPARATOR = H6C

Private Const VK_SUBTRACT = H6D

Private Const VK_DECIMAL = H6E

Private Const VK_DIVIDE = H6F

Private Const VK_F1 = H70

Private Const VK_F2 = H71

Private Const VK_F3 = H72

Private Const VK_F4 = H73

Private Const VK_F5 = H74

Private Const VK_F6 = H75

Private Const VK_F7 = H76

Private Const VK_F8 = H77

Private Const VK_F9 = H78

Private Const VK_F10 = H79

Private Const VK_F11 = H7A

Private Const VK_F12 = H7B

Private Const VK_F13 = H7C

Private Const VK_F14 = H7D

Private Const VK_F15 = H7E

Private Const VK_F16 = H7F

Private Const VK_F17 = H80

Private Const VK_F18 = H81

Private Const VK_F19 = H82

Private Const VK_F20 = H83

Private Const VK_F21 = H84

Private Const VK_F22 = H85

Private Const VK_F23 = H86

Private Const VK_F24 = H87

Private Const VK_NUMLOCK = H90

Private Const VK_SCROLL = H91

'

'VK_L* VK_R* - left and right Alt, Ctrl and Shift virtual keys.

'Used only as parameters to GetAsyncKeyState() and GetKeyState().

'No other API or message will distinguish left and right keys in this way.

'

Private Const VK_LSHIFT = HA0

Private Const VK_RSHIFT = HA1

Private Const VK_LCONTROL = HA2

Private Const VK_RCONTROL = HA3

Private Const VK_LMENU = HA4

Private Const VK_RMENU = HA5

'dwFlags

Private Const KEYEVENTF_EXTENDEDKEY = H1

Private Const KEYEVENTF_KEYUP = H2

Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)

Private Sub Command1_Click()

Call keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY, 0) '按下Alt鍵

Call keybd_event(VK_SNAPSHOT, 0, KEYEVENTF_EXTENDEDKEY, 0) '按下Print Screen鍵

Call keybd_event(VK_SNAPSHOT, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0) '抬起Print Screen鍵

Call keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0) '抬起Alt鍵

Call keybd_event(VK_LWIN, 0, KEYEVENTF_EXTENDEDKEY, 0) '按下Win鍵

Call keybd_event(VK_LWIN, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0) '抬起Win鍵

Call keybd_event(VK_NUMLOCK, 0, KEYEVENTF_EXTENDEDKEY, 0) '按下Num Lock鍵

Call keybd_event(VK_NUMLOCK, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0) '抬起Num Lock鍵

End Sub

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