Virtual Key codes provide a symbolic representation of user key presses.

Unit

Windows

Description

Virtual key codes allow you to represent keyboard values for non-alphanumeric keys.Windows defines special constants for each key the user can press. These constants can then be used to refer to the keystroke in Windows API calls or in an OnKeyUp or OnKeyDown event handler.

Most of the virtual key codes are defined in the Windows unit. Additional key codes may be defined in special-purpose Windows wrappers such as the imm unit. For alphabetic keys, you should use ord with an uppercase character, for example, ord( 'M' ). To create a virtual key code for an alphanumeric value, use the Ord method. For example the virtual key code for ‘7’ is Ord(‘

7’).

The following table lists the virtual key codes defined in the Windows unit:

Virtual Key Code Corresponding key

VK_LBUTTON Left mouse button

VK_RBUTTON Right mouse button

VK_CANCEL Control+Break

VK_MBUTTON Middle mouse button

VK_BACK Backspace key

VK_TAB Tab key

VK_CLEAR Clear key

VK_RETURN Enter key

VK_SHIFT Shift key

VK_CONTROL Ctrl key

VK_MENU Alt key

VK_PAUSE Pause key

VK_CAPITAL Caps Lock key

VK_KANA Used with IME

VK_HANGUL Used with IME

VK_JUNJA Used with IME

VK_FINAL Used with IME

VK_HANJA Used with IME

VK_KANJI Used with IME

VK_CONVERT Used with IME

VK_NONCONVERT Used with IME

VK_ACCEPT Used with IME

VK_MODECHANGE Used with IME

VK_ESCAPE Esc key

VK_SPACE Space bar

VK_PRIOR Page Up key

VK_NEXT Page Down key

VK_END End key

VK_HOME Home key

VK_LEFT Left Arrow key

VK_UP Up Arrow key

VK_RIGHT Right Arrow key

VK_DOWN Down Arrow key

VK_SELECT Select key

VK_PRINT Print key (keyboard-specific)

VK_EXECUTE Execute key

VK_SNAPSHOT Print Screen key

VK_INSERT Insert key

VK_DELETE Delete key

VK_HELP Help key

VK_LWIN Left Windows key (Microsoft keyboard)

VK_RWIN Right Windows key (Microsoft keyboard)

VK_APPS Applications key (Microsoft keyboard)

VK_NUMPAD0 0 key (numeric keypad)

VK_NUMPAD1 1 key (numeric keypad)

VK_NUMPAD2 2 key (numeric keypad)

VK_NUMPAD3 3 key (numeric keypad)

VK_NUMPAD4 4 key (numeric keypad)

VK_NUMPAD5 5 key (numeric keypad)

VK_NUMPAD6 6 key (numeric keypad)

VK_NUMPAD7 7 key (numeric keypad)

VK_NUMPAD8 8 key (numeric keypad)

VK_NUMPAD9 9 key (numeric keypad)

VK_MULTIPLY Multiply key (numeric keypad)

VK_ADD Add key (numeric keypad)

VK_SEPARATOR Separator key (numeric keypad)

VK_SUBTRACT Subtract key (numeric keypad)

VK_DECIMAL Decimal key (numeric keypad)

VK_DIVIDE Divide key (numeric keypad)

VK_F1 F1 key

VK_F2 F2 key

VK_F3 F3 key

VK_F4 F4 key

VK_F5 F5 key

VK_F6 F6 key

VK_F7 F7 key

VK_F8 F8 key

VK_F9 F9 key

VK_F10 F10 key

VK_F11 F11 key

VK_F12 F12 key

VK_F13 F13 key

VK_F14 F14 key

VK_F15 F15 key

VK_F16 F16 key

VK_F17 F17 key

VK_F18 F18 key

VK_F19 F19 key

VK_F20 F20 key

VK_F21 F21 key

VK_F22 F22 key

VK_F23 F23 key

VK_F24 F24 key

VK_NUMLOCK Num Lock key

VK_SCROLL Scroll Lock key

VK_LSHIFT Left Shift key (only used with GetAsyncKeyState and GetKeyState)

VK_RSHIFT Right Shift key (only used with GetAsyncKeyState and GetKeyState)

VK_LCONTROL Left Ctrl key (only used with GetAsyncKeyState and GetKeyState)

VK_RCONTROL Right Ctrl key (only used with GetAsyncKeyState and GetKeyState)

VK_LMENU Left Alt key (only used with GetAsyncKeyState and GetKeyState)

VK_RMENU Right Alt key (only used with GetAsyncKeyState and GetKeyState)

VK_PROCESSKEY Process key

VK_ATTN Attn key

VK_CRSEL CrSel key

VK_EXSEL ExSel key

VK_EREOF Erase EOF key

VK_PLAY Play key

VK_ZOOM Zoom key

VK_NONAME Reserved for future use

VK_PA1 PA1 key

VK_OEM_CLEAR Clear key

The following code aborts a print job if the user presses Esc. Note that you should setKeyPreview to True to ensure that the OnKeyDown event handler of Form1 is called.

procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);

begin

if (Key=VK_ESCAPE) and Printer.Printing then

begin

Printer.Abort;

MessageDlg('Printing aborted', mtInformation, [mbOK],0);

end;

end;

INNA WERSJA

community.borland.com

Article #15546: Lists the virtual key values

 Technical Information Database
 
TI546D.txt Lists the virtual key values
Category :Windows API
Platform :All
Product :Delphi All
 
Description:
Q: What are the values for the virtual keys?
 
A:
 
 vk_LButton = $01;
 vk_RButton = $02;
 vk_Cancel = $03;
 vk_MButton = $04; { NOT contiguous with L & RBUTTON }
 vk_Back = $08;
 vk_Tab = $09;
 vk_Clear = $0C;
 vk_Return = $0D;
 vk_Shift = $10;
 vk_Control = $11;
 vk_Menu = $12;
 vk_Pause = $13;
 vk_Capital = $14;
 vk_Escape = $1B;
 vk_Space = $20;
 vk_Prior = $21;
 vk_Next = $22;
 
 vk_End = $23;
 vk_Home = $24;
 vk_Left = $25;
 vk_Up = $26;
 vk_Right = $27;
 vk_Down = $28;
 vk_Select = $29;
 vk_Print = $2A;
 vk_Execute = $2B;
 vk_SnapShot = $2C;
{ vk_Copy = $2C not used by keyboards }
 vk_Insert = $2D;
 vk_Delete = $2E;
 vk_Help = $2F;
{ vk_A thru vk_Z are the same as their ASCII equivalents: 'A' thru 'Z' }
{ vk_0 thru vk_9 are the same as their ASCII equivalents: '0' thru '9' }
 
 vk_NumPad0 = $60;
 vk_NumPad1 = $61;
 vk_NumPad2 = $62;
 vk_NumPad3 = $63;
 vk_NumPad4 = $64;
 vk_NumPad5 = $65;
 vk_NumPad6 = $66;
 vk_NumPad7 = $67;
 vk_NumPad8 = $68;
 vk_NumPad9 = $69;
 vk_Multiply = $6A;
 vk_Add = $6B;
 vk_Separator = $6C;
 vk_Subtract = $6D;
 vk_Decimal = $6E;
 vk_Divide = $6F;
 vk_F1 = $70;
 vk_F2 = $71;
 vk_F3 = $72;
 vk_F4 = $73;
 vk_F5 = $74;
 
 vk_F6 = $75;
 vk_F7 = $76;
 vk_F8 = $77;
 vk_F9 = $78;
 vk_F10 = $79;
 vk_F11 = $7A;
 vk_F12 = $7B;
 vk_F13 = $7C;
 vk_F14 = $7D;
 vk_F15 = $7E;
 vk_F16 = $7F;
 vk_F17 = $80;
 vk_F18 = $81;
 vk_F19 = $82;
 vk_F20 = $83;
 vk_F21 = $84;
 vk_F22 = $85;
 vk_F23 = $86;
 vk_F24 = $87;
 vk_NumLock = $90;
 vk_Scroll = $91;
 
 
 
Reference:
 
 
7/16/98 4:33:47 PM
 

Last Modified: 01-SEP-99