Defined Constants for Buffers
As of release 12.0, VTScada has full support for Unicode (UTF-8). ASCII constants remain supported for legacy purposes.
The following constants are defined at the \System layer. In code that parses user-input strings, you should use these constants rather than creating your own buffers for common key values or key combinations.
| Buffer constants for ASCII codes | ||
|---|---|---|
| Name of Constant | Contents | Description |
| BS | MakeBuff(1, 8) | Backspace key |
| CR | MakeBuff(1, 13) | Carriage return |
| CRLF | Concat(CR, LF) | CR/LF pair |
| ESC | MakeBuff(1, 27) | Escape key |
| FF | MakeBuff(1,12) | Form feed |
| LF | MakeBuff(1, 10) | Line feed |
| NULL | MakeBuff(1, 0) | Null byte |
| TAB | MakeBuff(1, 9) | Tab key |
| CtrlBraceOpen | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBC)) | Ctrl and [ |
| CtrlBraceClose | Concat(MakeBuff(1, 253), MakeBuff(1, 0x39)) | Ctrl and ] |
| UpArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x48)) | Up arrow key |
| DownArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x50)) | Down arrow key |
| LeftArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x4B)) | Left arrow key |
| RightArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x4D)) | Right arrow key |
| AltLeftArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x9B)) | Alt and left arrow |
| AltRightArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x9D)) | Alt and right arrow |
| SUpArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0xB8)) | Shift and up arrow |
| SDownArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0xC0)) | Shift and down arrow |
| PageUp | Concat(MakeBuff(1, 253), MakeBuff(1, 0x49)) | Page up key |
| PageDown | Concat(MakeBuff(1, 253), MakeBuff(1, 0x51)) | Page down key |
| HomeKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x47)) | Home key |
| EndKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x4F)) | End key |
| DeleteKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x53)) | Delete key |
| SPageUp | Concat(MakeBuff(1, 253), MakeBuff(1, 0xB9)) | Shift and page up |
| SPageDown | Concat(MakeBuff(1, 253), MakeBuff(1, 0xC1)) | Shift and page down |
| SHomeKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0xB7)) | Shift and home |
| SEndKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBF)) | Shift and end |
| CtrlPageUp | Concat(MakeBuff(1, 253), MakeBuff(1, 0x84)) | Ctrl and page up |
| CtrlPageDown | Concat(MakeBuff(1, 253), MakeBuff(1, 0x76)) | Ctrl and page down |
| CtrlHome | Concat(MakeBuff(1, 253), MakeBuff(1, 0x77)) | Ctrl and home |
| CtrlEnd | Concat(MakeBuff(1, 253), MakeBuff(1, 0x75)) | Ctrl and end |
| CtrlBKey | MakeBuff(1, 2) | Ctrl and B |
| CtrlCKey | MakeBuff(1, 3) | Ctrl and C |
| CtrlDKey | MakeBuff(1, 4) | Ctrl and D |
| CtrlIKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0xB5)) | Ctrl and I |
| CtrlMKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBA)) | Ctrl and M |
| CtrlPKey | MakeBuff(1, 16) | Ctrl and P |
| CtrlSKey | MakeBuff(1, 19) | Ctrl and S |
| CtrlTKey | MakeBuff(1, 20) | Ctrl and T |
| CtrlUKey | MakeBuff(1, 21) | Ctrl and U |
| CtrlVKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x06)) | Ctrl and V |
| CtrlXKey | MakeBuff(1, 24) | Ctrl and X |
| CtrlYKey | MakeBuff(1, 25) | Ctrl and Y |
| CtrlZKey | MakeBuff(1, 26) | Ctrl and Z |
| Buffer constants for non-ASCII codes | ||
| AltEnter | Concat(MakeBuff(1, 253), MakeBuff(1, 0x32)) | Alt and Enter |
| AltUpArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0x98)) | Alt and up arrow |
| SLeftArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBB)) | Shift and left arrow |
| SRightArrow | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBD)) | Shift and right arrow |
| F2 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x3C)) | F2 |
| F3 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x3D)) | F3 |
| F4 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x3E)) | F4 |
| F5 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x3F)) | F5 |
| ShiftF2 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x55)) | Shift and F2 |
| ShiftF3 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x56)) | Shift and F3 |
| ShiftF4 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x57)) | Shift and F4 |
| ShiftF5 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x58)) | Shift and F5 |
| STab | Concat(MakeBuff(1, 253), MakeBuff(1, 0x09)) | Shift and Tab |
| CtrlTab | Concat(MakeBuff(1, 253), MakeBuff(1, 0x94)) | Ctrl and Tab |
| CtrlShiftTab | Concat(MakeBuff(1, 253), MakeBuff(1, 0x9C)) | Ctrl, Shift and Tab |
| CtrlMinus | Concat(MakeBuff(1, 253), MakeBuff(1, 0x2A)) | Ctrl and - |
| CtrlPlus | Concat(MakeBuff(1, 253), MakeBuff(1, 0x2D)) | Ctrl and + |
| CtrlShiftMinus | MakeBuff(1, 0x1F) | Ctrl, Shift and - |
| CtrlShiftPlus | Concat(MakeBuff(1, 253), MakeBuff(1, 0x2E)) | Ctrl, Shift and + |
| CtrlNumAdd | Concat(MakeBuff(1, 253), MakeBuff(1, 0x90)) | Ctrl and Numpad + |
| CtrlNumSubtract | Concat(MakeBuff(1, 253), MakeBuff(1, 0x8E)) | Ctrl and Numpad - |
| CtrlNumMultiply | Concat(MakeBuff(1, 253), MakeBuff(1, 0x36)) | Ctrl and Numpad * |
| CtrlShiftNumAdd | Concat(MakeBuff(1, 253), MakeBuff(1, 0x9A)) | Ctrl, Shift & Numpad + |
| CtrlShiftNumSubtract | Concat(MakeBuff(1, 253), MakeBuff(1, 0x96)) | Ctrl, Shift & Numpad - |
| AltNumMultiply | Concat(MakeBuff(1, 253), MakeBuff(1, 0x37)) | Alt & Numpad* |
| WinContext | Concat(MakeBuff(1, 253), MakeBuff(1, 0xE8)) | Context Menu Key |
| CtrlTilde | Concat(MakeBuff(1, 253), MakeBuff(1, 0x26)) | Ctrl and ~ |
| CtrlShiftBraceOpen | Concat(MakeBuff(1, 253), MakeBuff(1, 0xBE)) | Ctrl, Shift and [ |
| CtrlShiftBraceClose | Concat(MakeBuff(1, 253), MakeBuff(1, 0x3A)) | Ctrl, Shift and ] |
| Ctrl0 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x72)) | Ctrl and 0 |
| CtrlNum0 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x92)) | Ctrl and Numpad0 |
| Alt0 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x81)) | Alt and 0 |
| AltNum0 | Concat(MakeBuff(1, 253), MakeBuff(1, 0x9E)) | Alt and Numpad0 |
| CtrlShiftNKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x08)) | Ctrl, Shift and N |
| CtrlShiftVKey | Concat(MakeBuff(1, 253), MakeBuff(1, 0x05)) | Ctrl, Shift and V |
