How to Convert Hex to Byte in VB6

By Society & Culture & Entertainment Last updated Friday, May/31/2024

1). Open the VB6 file in an editor such as Microsoft Visual Basic 6.0.
2). Declare "Byte" and "String" variables to use in the conversion process by adding the following code at the top of your function:

Dim h_byte As Byte

Dim strhex As String
3). Retrieve a numeric value from the user with an "InputBox" by adding the code:

strhex = InputBox("Type a Hex value:")

strhex = "&H" & strhex

or

strhex = InputBox("Type a Decimal value:")

strhex = Hex(strhex)

The user is prompted for a value with a pop-up box. Hexadecimal values in VB6 have an "&H" prepended to the string. The "Hex" function converts a decimal number into hexadecimal.
4). Call the "CByte" function to convert the hexadecimal value to the "Byte" data type by adding the code:

h_byte = CByte(strhex)

The "strhex" variable must have a numeric value from zero to 255 or the "CByte" function will return an error. Fractional parts, such as 121.56, are rounded.
5). Save the VB6 file, compile and run the program to convert the hexadecimal number to a byte.

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