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Thank you IGOR !<br />
I had an obvious programming error. Thanks to IGOR's suggestion my mistake became visible.<br />

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Thank you IGOR !
I had an obvious programming error. Thanks to IGOR's suggestion my mistake became visible.


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In Delphi3 I can use the keyboard arrow keys up and down by calling the events &quot;OnKeyDown&quot; or &quot;OnKeyUp&quot; or I can use &quot;OnKeyPressed&quot; with ASCII codes like #13 etc. I do not find a way to use the keyboard left and right arrow keys to control parameters; it seems that in Delhi these keys are not recognized. Can anyone give me a hint?
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In Delphi3 I can use the keyboard arrow keys up and down by calling the events "OnKeyDown" or "OnKeyUp" or I can use "OnKeyPressed" with ASCII codes like #13 etc. I do not find a way to use the keyboard left and right arrow keys to control parameters; it seems that in Delhi these keys are not recognized. Can anyone give me a hint?

using the keyboard/arrow keys

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