Converting a Decimal Textbox Entry to Hexadecimal to output to another Textbox

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C++/CLI

Hello all,

I am trying to craft a Decimal to Hexadecimal converter for my serial port communication program. I have hit one stumbling block, I am having issues figuring out how to input the textbox value (user generated up to 99) into the char array. Any and all help is greatly appreciated.

How should I go about storing the textbox value into the char array?

Here is the code that works before mucking it up (granted "0x3F" is the only output here):

       int i=0;
char integer_string[] = "63";   //The 63 is the value that must change based on the entry from the user into the textbox aptly named "dec".
char hex_string[10] = "";
i = atoi (integer_string);
sprintf (hex_string, "0x%02X", i);
hex->Text = gcnew String(hex_string);

For anyone following at home, here is the end result of the code with solution in place:

int i=0;
i = Int32::Parse(dec->Text);
char hex_string[10] = "";
sprintf (hex_string, "0x%02X", i);
hex->Text = gcnew String(hex_string);