Owner's manual

DOKuStar Validation for Ascent Capture Page • 75
Handling Keyboard Strokes
Keyboard strokes can also be handled by an add-in for DOKuStar Validation. The appropriate service is called
Keyboard service. First you must provide the keyboard service of Validation.
The keyboard service has two functions
OnChar() and OnKeyDown(). In OnChar() you get the final code
from the keyboard. That means if you press
Shift-A, you get the final key code in OnChar(), in this case 65. In
OnKeyDown() you get the code for Shift and a. Normally you would implement hotkeys in OnKeyDown().
For our example we assume that numbers should be suppressed in the edit control and that the user should get a
message box if he presses
F4.