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OnKeyDown with "virtual key codes". How?

Posted on 2001-06-08
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Last Modified: 2012-06-21
I'm working in Borland C++ Builder 4 under win98.

I'm using the OnKeyDown event as input on a form. I want to determine which key was pressed, which works good in most cases. But the keys on the numeric keypad are reported all wrong, '1' gets value 97, '2' gets value 98 etc. I've heard something about "virtual key codes", what is it about, and how do I use it?

The OnKeyPress event handles the numeric keypad correctly, but can't handle the arrowkeys etc. so I don't want to use OnKeyPress.

Thanks for help
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Question by:TropicalFish
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6 Comments
 

Expert Comment

by:scooter1
ID: 6170066
Try VK_LEFT,VK_RIGHT, VK_UP, VK_DOWN for arrow keys, or try VK_NUMPAD4,VK_NUMPAD2 for numbers 4 and 2 on keypad.
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Author Comment

by:TropicalFish
ID: 6170547
I need to register the ASCII character for the key pressed, like OnKeyPress does. if I convert the value I get like this: char(Key), then the numpad '1' becomes 'a'. I need to show the correct ASCII character for all keys that have one (all keys that OnKeyPress respond to) which includes the numpad +, -, * and /. The determination of what key was pressed works fine for all keys with OnKeyDown, it's the character that's returned that's not always right.
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Accepted Solution

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DanRollins earned 150 total points
ID: 6175091
Try:
if (key==VK_NUMPAD4) char='4';
(etc)

-- Dan
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Author Comment

by:TropicalFish
ID: 6178066
Yeah, I guess... even if it is very ugly.
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LVL 49

Expert Comment

by:DanRollins
ID: 6178406
Why do you insult me with a C?  I was trying to be helpful, so I post a comment providing a possible solution.   Now I have a C on my history.

In the future, I will know not to provide help to you.  Thanks for nothing.

-- Dan
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Author Comment

by:TropicalFish
ID: 6183384
I'm sorry if I offended you, I didn't realize that "average" was thought of as a really horrible grade. I thought it meant average as in not bad, but not great either. I do appreciate your help.
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