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Thread: may be stupid question..

  1. May 23rd, 2000, 07:33 PM #1
    Indian
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    Cool

    Hi there!
    Are API constants to be used in the same format like the one seen below?
    Public Const ERROR_SUCCESS = 0&
    Public Const HKEY_DYN_DATA = &H80000006
    Can I give a different name to the constant?

    Well I could understand some of the functions. But where can I find the whole API constants?
    why '&' is used in almost all the declarations?


    Please help.
    Thanx,
    Calm Indian.
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  2. May 23rd, 2000, 10:04 PM #2
    MartinLiss
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    The & means that it's a hexidecimal value. You can get a lot of other info on APIs by clicking the VB API link at the left.
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  3. May 24th, 2000, 03:30 AM #3
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    Here's another way to find API Constants. Open your API Text Viewer and select the file Win32api.txt. At the top CombBox where it says "Declares", switch it to Constants and a list should come up.

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  4. May 24th, 2000, 03:57 AM #4
    kedaman
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    & means string addition and long integer, not hex. The hex is &H and a hexvalue following it. You could get the decimal value from hex by throwing it into immediate window and put a ? before it and press enter.

    No you do not have to use hexvalues if you don't want to. If you feel more comfortable with dec values, then just do as i said and replace them.
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  6. May 24th, 2000, 04:10 AM #5
    MartinLiss
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    I made a couple of mistakes in my original reply to you. When I said that the & meant hexidecimal I meant to say &H as in the HKEY_DYN_DATA value. I also overlooked that you also asked about ERROR_SUCCESS which as kedaman correctly points out is defined as a Long via the &. I'm not sure however that he is right when he implies that you can use use decimal values in the place of hex values in API calls. All I know is that API calls, especially under NT, are very sensitive to the expected data type.
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  7. May 24th, 2000, 09:08 AM #6
    G.Kumaraguru
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    Well answering the original question by INDIAN.

    "Can I give a different name to the constant?"

    YES ! you can... but you can also call a donkey a cat,
    a goat a rat and so on... Then there will be no standard on who should call which donkey as what ?


    To avoid all this, there is a standard way of naming windows
    api constants. And this is used in win32 programming ..whether u chose to do that in vb or c++ or in MASM.
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  8. May 24th, 2000, 11:03 AM #7
    Indian
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    Cool Thanks...

    Thanks a lot guys!!!


    Calm Indian.
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