It uses for the game client packet. If you treat the variable to DWORD or not, it makes you wish.

hex_to_byte_dword_or_not.cs

public void setBnetByte(String strData, bool isVariable = false)
{
    String hexData = bnetHelper.Acsii2Hex(strData);
    if (isVariable)
    {
        byte[] bData = bnetHelper.Hex2Byte(hexData);
        this.setBnetByte(bData);
    }
    else {
        UInt32 intData = UInt32.Parse(hexData, System.Globalization.NumberStyles.AllowHexSpecifier);
        this.setBnetByte(intData, isVariable);
    }
}