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Thread: [RESOLVED] Small C# Code to VB6

  1. #1

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    Resolved [RESOLVED] Small C# Code to VB6

    Hi to all,

    I just need some help converting this c# code to vb6.
    Code:
         int txtValue;
         txtValue = int.Parse(txt1.Text);
         MessageBox.Show(txtValue.ToString("X2"));
    I tried the below VB6 string to Hex function but it give a different result from the above C#.
    In C#, If I put 1 in textbox and convert, I got 01 result, but in VB6 I got 31?

    Here is the code that I got here.
    Any body can help to modify this code to give the same result as C# would be greatly appreciated. Thanks.
    Code:
    Public Function StringToHex(ByVal StrToHex As String) As String
    Dim strTemp   As String
    Dim strReturn As String
    Dim I         As Long
        For I = 1 To Len(StrToHex)
            strTemp = Hex$(Asc(Mid$(StrToHex, I, 1)))
            If Len(strTemp) = 1 Then strTemp = "0" & strTemp
            strReturn = strReturn & Space$(1) & strTemp
        Next I
        StringToHex = strReturn
    End Function

  2. #2
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    Re: Small C# Code to VB6

    Your code is showing the hex representation of a character "1" not the integer value 1.

  3. #3
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    Re: Small C# Code to VB6

    Code:
        Dim Value As Byte
    
        Value = CByte(txt1.Text)
        If Value < 16 Then
            MsgBox "0" & Hex$(Value)
        Else
            MsgBox Hex$(Value)
        End If

  4. #4

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    Re: Small C# Code to VB6

    thanks for pointing out. I will try to restructure the function.

  5. #5

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    Re: Small C# Code to VB6

    Thanks for this. Is there a way to handle big numbers? I tried to convert a value of 2100100.99 but I got an overflow error.

  6. #6
    PowerPoster Arnoutdv's Avatar
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    Re: Small C# Code to VB6

    Thats a floating point number.
    The Cbyte is for converting byte values.
    The are other conversion methods, like CLng and CDbl

  7. #7
    PowerPoster Arnoutdv's Avatar
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    Re: Small C# Code to VB6

    Whats the definition for converting real numbers to a hexadecimal representation??

  8. #8
    PowerPoster Elroy's Avatar
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    Re: Small C# Code to VB6

    Quote Originally Posted by Arnoutdv View Post
    Whats the definition for converting real numbers to a hexadecimal representation??
    VB6 doesn't have any mechanism for handling floating point hex numbers. Many C/C++ languages can handle them. Typically, they have a p# suffix where # is a power-of-two exponent applied to the number, but VB6 knows nothing about such things.

    You might search for "C" "hex" "floating point" if you want more information. I don't think I've ever seen anyone write anything in VB6 to handle any of this though, but it's not the worst of ideas.
    Any software I post in these forums written by me is provided AS IS without warranty of any kind, expressed or implied, and permission is hereby granted, free of charge and without restriction, to any person obtaining a copy. Please understand that Ive been programming since the mid-1970s and still have some of that code. My contemporary VB6 project is approaching 1,000 modules. In addition, I have a VB6 random code folder that is overflowing. Ive been at this long enough to truly not know with absolute certainty from whence every single line of my code has come, with much of it coming from programmers under my employ who signed intellectual property transfers. I have not deliberately attempted to remove any licenses and/or attributions from any software. If someone finds that I have inadvertently done so, I sincerely apologize, and, upon notice and reasonable proof, will re-attach those licenses and/or attributions. To all, peace and happiness.

  9. #9
    PowerPoster Elroy's Avatar
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    Re: Small C# Code to VB6

    And another approach is to grab the Double's (or Single's) bits and put them into some type of integer via CopyMemory, and then convert that integer to hex. But that's really a kludge, as that hex number won't really represent the original float number at all. It'll just be like looking at a saved Double (or Single) in a hex editor, which typically doesn't mean much.
    Any software I post in these forums written by me is provided AS IS without warranty of any kind, expressed or implied, and permission is hereby granted, free of charge and without restriction, to any person obtaining a copy. Please understand that Ive been programming since the mid-1970s and still have some of that code. My contemporary VB6 project is approaching 1,000 modules. In addition, I have a VB6 random code folder that is overflowing. Ive been at this long enough to truly not know with absolute certainty from whence every single line of my code has come, with much of it coming from programmers under my employ who signed intellectual property transfers. I have not deliberately attempted to remove any licenses and/or attributions from any software. If someone finds that I have inadvertently done so, I sincerely apologize, and, upon notice and reasonable proof, will re-attach those licenses and/or attributions. To all, peace and happiness.

  10. #10
    PowerPoster Elroy's Avatar
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    Re: Small C# Code to VB6

    I searched, and the primary page I had for a reference is gone. The only thing I found was here, but there's not much to it, and here's what it says:

    6.15 Hex Floats

    ISO C99 and ISO C++17 support floating-point numbers written not only in the usual decimal notation, such as 1.55e1, but also numbers such as 0x1.fp3 written in hexadecimal format. As a GNU extension, GCC supports this in C90 mode (except in some cases when strictly conforming) and in C++98, C++11 and C++14 modes. In that format the 0x hex introducer and the p or P exponent field are mandatory. The exponent is a decimal number that indicates the power of 2 by which the significant part is multiplied. Thus 0x1.f is 1 15/16, p3 multiplies it by 8, and the value of 0x1.fp3 is the same as 1.55e1.

    Unlike for floating-point numbers in the decimal notation the exponent is always required in the hexadecimal notation. Otherwise the compiler would not be able to resolve the ambiguity of, e.g., 0x1.f. This could mean 1.0f or 1.9375 since f is also the extension for floating-point constants of type float.
    Any software I post in these forums written by me is provided AS IS without warranty of any kind, expressed or implied, and permission is hereby granted, free of charge and without restriction, to any person obtaining a copy. Please understand that Ive been programming since the mid-1970s and still have some of that code. My contemporary VB6 project is approaching 1,000 modules. In addition, I have a VB6 random code folder that is overflowing. Ive been at this long enough to truly not know with absolute certainty from whence every single line of my code has come, with much of it coming from programmers under my employ who signed intellectual property transfers. I have not deliberately attempted to remove any licenses and/or attributions from any software. If someone finds that I have inadvertently done so, I sincerely apologize, and, upon notice and reasonable proof, will re-attach those licenses and/or attributions. To all, peace and happiness.

  11. #11

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    Re: Small C# Code to VB6

    thanks a lot now I get the idea.

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