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.he 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.
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Unlike most other tests which can only detect exposures one at a time, the ALCAT is the premier test for detecting almost all food allergies and other sensitivities/intolerances. According to some studies, the ALCAT test can be up to 83.4 percent accurate with food allergens and 96 percent accurate with food additives. Contact the HealthGains team at (866) 734-5771 to order your test today. How Does the ALCAT Test Work? The ALCAT blood test works by measuring the changes in size and amount of white blood cells.