Virtual Key Codes Used by Windows

Virtual Key Codes Used by Windows Windows defines special constants for each key the user can press. The virtual-key codes identify various virtual keys. These constants can then be used to refer to the keystroke when using Delphi and Windows API calls or in an OnKeyUp or OnKeyDown event handler. Virtual keys mainly consist of actual keyboard keys, but also include virtual elements such as the three mouse buttons. Delphi defines all constants for Windows virtual key codes in the Windows unit. Keyboard and VK Codes Here are some of the Delphi articles that deal with the keyboard and VK codes: Keyboard SymphonyDelphi For Beginners:Â  Get familiar with the OnKeyDown, OnKeyUp, and onKeyPress event procedures to respond to various key actions or handle and process ASCII characters along with other special purpose keys. How to Translate a Virtual Key Code into a CharacterWindows defines special constants for each key the user can press. The virtual-key codes identify various virtual keys. In Delphi, the OnKeyDown and OnKeyUp events provide the lowest level of keyboard response. To use OnKeyDown or OnKeyUp to test for keys the user presses, you must use Virtual key codes to get the key pressed. Heres how to translate the virtual key code to the corresponding Windows character. Touch Me - Im UntouchableIntercepting keyboard input for controls that cannot receive the input focus. Working with keyboard hooks from Delphi. ENTERing TabUsing the Enter key like a Tab key with Delphi controls. Abort a Loop by Pressing a KeyUse the VK_ESCAPE to abort a (for) loop. Use Arrow Keys to Move Between ControlsThe UP and DOWN arrow keys are virtually useless in edit controls. So why not use them for navigating between fields. Simulating Keystrokes from CodeA handy function to simulate the pressing of keyboard keys.