delphi中的按键说明.docx

1、delphi中的按键说明Delphi中一些常用的组合键值CTRL+A:#1 CTRL+B:#2 CTRL+C:#3 CTRL+D:#4 CTRL+E:#5 CTRL+F:#6 CTRL+G:#7CTRL+H:#8 CTRL+I:#9 CTRL+J:#10 CTRL+K:#11 CTRL+L:#12 CR:#13 CTRL+N:#14CTRL+O:#15 CTRL+P:#16 CTRL+Q:#17 CTRL+R:#18 CTRL+S:#19 CTRL+T:#20CTRL+U:#21 CTRL+V:#22 CTRL+W:#23 CTRL+X:#24 CTRL+Y:#25 CTRL+Z:#26 ES

2、C:#27CTRL+:#28 CTRL+:#29 SHIFT+CTRL+-:#30 DEL:#127一般用在keydown、keyup、keypress事件中。OnKeyDown和OnKeyUp事件中的Key是Word型的，表示用户按的是键盘上的哪个键，OnKeyPress中的Key是Char型，表示用户输入什么字符。一个产生8位(char)常规健值，一个产生16位(word)功能健健值。1.KeyPress主要用来捕获数字(注意：包括Shift+数字的符号)、字母（注意：包括大小写）、小键盘等除了F1-12、SHIFT、Alt、Ctrl、Insert、Home、PgUp、Delete、End

3、、PgDn、ScrollLock、Pause、NumLock、菜单键、开始键和方向键外的ANSI字符，KeyDown和KeyUp 通常可以捕获键盘除了PrScrn所有按键(这里不讨论特殊键盘的特殊键）2.KeyPress 只能捕获单个字符KeyDown 和KeyUp 可以捕获组合键。3.KeyPress 可以捕获单个字符的大小写4.KeyDown和KeyUp 对于单个字符捕获的KeyValue 都是一个值，也就是不能判断单个字符的大小写。5.KeyPress 不区分小键盘和主键盘的数字字符。KeyDown 和KeyUp 区分小键盘和主键盘的数字字符。6.其中PrScrn 按键KeyPress、

4、KeyDown和KeyUp 都不能捕获。keydown是键盘按下任何键keypress是键盘按下任何数字键和任何字母键keydown与keypress的声明格式差别很大1onkeydown事件typeTKeyEvent = procedure (Sender: TObject; var Key: Word; Shift: TShiftState) of object;property OnKeyDown: TKeyEvent;该事件在有任何键按下的时候，就发生。看！它响应的是Word类型，还能识别Shift键状态2onkeypress事件type TKeyPressEvent = proced

5、ure (Sender: TObject; var Key: Char) of object;property OnKeyPress: TKeyPressEvent;该事件响应的是字符类型Char，只能识别ASCII码，不能识别组合键和控制键和功能键。按下功能键、控制键不产生该事件，但产生OnkeyDown事件。TWinControl与键盘相关的3个事件如下：OnKeyDown：键按下OnKeyPress：有Ascii字符产生OnKeyUp：键放开其中OnKeyDown、OnKeyUp对任何按键都有响应，传入参数为var Key: Word 键的扫描值 Shift: TShiftState 表

6、示控制键状态，包括键盘上的Ctrl、Shift、Alt和鼠标的左、中、右键及双击。OnKeyPress事件只对Ascii有响应，传入参数为var Key: Char Ascii字符/例如F1-F10只有onKeydown有反应另外TWincontrol. KeyPreview:Boolean属性确定控件是否在子控件之前处理按键。比如说enter键,onkeypress事件if key=#13 then /当你按下enter键时触发该事件dosomethingonkeydown事件ifkey=13 then /当你按下enter键时触发该事件do something其中所有的KeyDown事件里

7、面应该用如下判断：if Key = VK_RETURN then.所有的KeyPress事件里面应该用如下判断：if Key = #13 then.postmessage(self.handle,wm_keydown,vk_tab,0);keybd_event(VK_TAB,2,0,0);perform(WM_NEXTDLGCTL,0,0);SelectNext(ActiveControl, True, True);.但是显然用回车代码TAB显然不适合于BUTTON，你在它上面按回车的时候它会执行OnClick，所以不会TAB，你可以用别的键代替回车。键值在keydown事件里面showmes

8、sage(inttostr(key);在keypress事件里面showmessage(key);就知道了。Form1.KeyPreview := True;procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;Shift: TShiftState);beginShowmessage(IntToStr(Key);end;procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);beginShowmessage(IntToStr(Ord(Key);end; Virt

9、ual Keys, Standard Set $EXTERNALSYM VK_LBUTTONVK_LBUTTON = 1;$EXTERNALSYM VK_RBUTTONVK_RBUTTON = 2;$EXTERNALSYM VK_CANCELVK_CANCEL = 3;$EXTERNALSYM VK_MBUTTONVK_MBUTTON = 4; NOT contiguous with L & RBUTTON $EXTERNALSYM VK_BACKVK_BACK = 8;$EXTERNALSYM VK_TABVK_TAB = 9;$EXTERNALSYM VK_CLEARVK_CLEAR =

10、12;$EXTERNALSYM VK_RETURNVK_RETURN = 13;$EXTERNALSYM VK_SHIFTVK_SHIFT = $10;$EXTERNALSYM VK_CONTROLVK_CONTROL = 17;$EXTERNALSYM VK_MENUVK_MENU = 18;$EXTERNALSYM VK_PAUSEVK_PAUSE = 19;$EXTERNALSYM VK_CAPITALVK_CAPITAL = 20;$EXTERNALSYM VK_KANA VK_KANA = 21;$EXTERNALSYM VK_HANGUL VK_HANGUL = 21;$EXTER

11、NALSYM VK_JUNJA VK_JUNJA = 23;$EXTERNALSYM VK_FINAL VK_FINAL = 24;$EXTERNALSYM VK_HANJA VK_HANJA = 25;$EXTERNALSYM VK_KANJI VK_KANJI = 25;$EXTERNALSYM VK_CONVERT VK_CONVERT = 28;$EXTERNALSYM VK_NONCONVERT VK_NONCONVERT = 29;$EXTERNALSYM VK_ACCEPT VK_ACCEPT = 30;$EXTERNALSYM VK_MODECHANGE VK_MODECHAN

12、GE = 31;$EXTERNALSYM VK_ESCAPEVK_ESCAPE = 27;$EXTERNALSYM VK_SPACEVK_SPACE = $20;$EXTERNALSYM VK_PRIORVK_PRIOR = 33;$EXTERNALSYM VK_NEXTVK_NEXT = 34;$EXTERNALSYM VK_ENDVK_END = 35;$EXTERNALSYM VK_HOMEVK_HOME = 36;$EXTERNALSYM VK_LEFTVK_LEFT = 37;$EXTERNALSYM VK_UPVK_UP = 38;$EXTERNALSYM VK_RIGHTVK_R

13、IGHT = 39;$EXTERNALSYM VK_DOWNVK_DOWN = 40;$EXTERNALSYM VK_SELECTVK_SELECT = 41;$EXTERNALSYM VK_PRINTVK_PRINT = 42;$EXTERNALSYM VK_EXECUTEVK_EXECUTE = 43;$EXTERNALSYM VK_SNAPSHOTVK_SNAPSHOT = 44;$EXTERNALSYM VK_INSERTVK_INSERT = 45;$EXTERNALSYM VK_DELETEVK_DELETE = 46;$EXTERNALSYM VK_HELPVK_HELP = 4

14、7; VK_0 thru VK_9 are the same as ASCII 0 thru 9 ($30 - $39) VK_A thru VK_Z are the same as ASCII A thru Z ($41 - $5A) $EXTERNALSYM VK_LWINVK_LWIN = 91;$EXTERNALSYM VK_RWINVK_RWIN = 92;$EXTERNALSYM VK_APPSVK_APPS = 93;$EXTERNALSYM VK_NUMPAD0VK_NUMPAD0 = 96;$EXTERNALSYM VK_NUMPAD1VK_NUMPAD1 = 97;$EXT

15、ERNALSYM VK_NUMPAD2VK_NUMPAD2 = 98;$EXTERNALSYM VK_NUMPAD3VK_NUMPAD3 = 99;$EXTERNALSYM VK_NUMPAD4VK_NUMPAD4 = 100;$EXTERNALSYM VK_NUMPAD5VK_NUMPAD5 = 101;$EXTERNALSYM VK_NUMPAD6VK_NUMPAD6 = 102;$EXTERNALSYM VK_NUMPAD7VK_NUMPAD7 = 103;$EXTERNALSYM VK_NUMPAD8VK_NUMPAD8 = 104;$EXTERNALSYM VK_NUMPAD9VK_

16、NUMPAD9 = 105;$EXTERNALSYM VK_MULTIPLYVK_MULTIPLY = 106;$EXTERNALSYM VK_ADDVK_ADD = 107;$EXTERNALSYM VK_SEPARATORVK_SEPARATOR = 108;$EXTERNALSYM VK_SUBTRACTVK_SUBTRACT = 109;$EXTERNALSYM VK_DECIMALVK_DECIMAL = 110;$EXTERNALSYM VK_DIVIDEVK_DIVIDE = 111;$EXTERNALSYM VK_F1VK_F1 = 112;$EXTERNALSYM VK_F2

17、VK_F2 = 113;$EXTERNALSYM VK_F3VK_F3 = 114;$EXTERNALSYM VK_F4VK_F4 = 115;$EXTERNALSYM VK_F5VK_F5 = 116;$EXTERNALSYM VK_F6VK_F6 = 117;$EXTERNALSYM VK_F7VK_F7 = 118;$EXTERNALSYM VK_F8VK_F8 = 119;$EXTERNALSYM VK_F9VK_F9 = 120;$EXTERNALSYM VK_F10VK_F10 = 121;$EXTERNALSYM VK_F11VK_F11 = 122;$EXTERNALSYM V

18、K_F12VK_F12 = 123;$EXTERNALSYM VK_F13VK_F13 = 124;$EXTERNALSYM VK_F14VK_F14 = 125;$EXTERNALSYM VK_F15VK_F15 = 126;$EXTERNALSYM VK_F16VK_F16 = 127;$EXTERNALSYM VK_F17VK_F17 = 128;$EXTERNALSYM VK_F18VK_F18 = 129;$EXTERNALSYM VK_F19VK_F19 = 130;$EXTERNALSYM VK_F20VK_F20 = 131;$EXTERNALSYM VK_F21VK_F21

19、= 132;$EXTERNALSYM VK_F22VK_F22 = 133;$EXTERNALSYM VK_F23VK_F23 = 134;$EXTERNALSYM VK_F24VK_F24 = 135;$EXTERNALSYM VK_NUMLOCKVK_NUMLOCK = 144;$EXTERNALSYM VK_SCROLLVK_SCROLL = 145; VK_L & VK_R - left and right Alt, Ctrl and Shift virtual keys.Used only as parameters to GetAsyncKeyState() and GetKeyS

20、tate().No other API or message will distinguish left and right keys in this way. $EXTERNALSYM VK_LSHIFTVK_LSHIFT = 160;$EXTERNALSYM VK_RSHIFTVK_RSHIFT = 161;$EXTERNALSYM VK_LCONTROLVK_LCONTROL = 162;$EXTERNALSYM VK_RCONTROLVK_RCONTROL = 163;$EXTERNALSYM VK_LMENUVK_LMENU = 164;$EXTERNALSYM VK_RMENUVK

21、_RMENU = 165;$EXTERNALSYM VK_PROCESSKEYVK_PROCESSKEY = 229;$EXTERNALSYM VK_ATTNVK_ATTN = 246;$EXTERNALSYM VK_CRSELVK_CRSEL = 247;$EXTERNALSYM VK_EXSELVK_EXSEL = 248;$EXTERNALSYM VK_EREOFVK_EREOF = 249;$EXTERNALSYM VK_PLAYVK_PLAY = 250;$EXTERNALSYM VK_ZOOMVK_ZOOM = 251;$EXTERNALSYM VK_NONAMEVK_NONAME = 252;$EXTERNALSYM VK_PA1VK_PA1 = 253;$EXTERNALSYM VK_OEM_CLEARVK_OEM_CLEAR = 254;：），其实不用记，你不是用delphi吗，在ide里面输入vk_f1总会吧，然后按住ctrl键单击刚才你输入的vk_f1，就会出来啦！至于key:char的值，就是key:word的ascII码，你可以看chr(vk_f1),chr(vk_enter),都可以哈！