Format a decimal to string

The VFP Function STR() will convert a Numeric to a String.

If you look in your VFP Help for that funcion you will see it described in detail.  

Another VFP function which may work for you is the TRANSFORM() function.  
Again look into your VFP Help for more explanation

Lastly if you want to Pad out the string value to a fixed number of digits you will likely want to use the PADL() or PADR() function (see your VFP Help)

Note that since you seem to want to change the numeric value (example:  from -4.99 to 499) I'd recommend doing that (maybe in a temporary cursor) PRIOR to converting the value to a String.

Perhaps something like:
    nTestValue = -4.99
    nNewTestValue = ((-1 * nTestValue) * 100)
    cNewTestValue = ALLTRIM(STR(nNewTestValue))
    cNewTestValue = PADL(cNewTestValue,10,'0')
If you have questions about any individual line, look up the function in your VFP Help.

Good Luck

I use this command.
  REPLACE DISC_AMT  WITH PADL(ALLTRIM(STRTRAN(STR(ABS(b->promodsc),99,2),".")),10,"0")

Resulting error message..
Function argument value,type or count is invalid.

Probably the problem is that your data type is character and I assumed it was numeric. Try this:

PADL(ALLTRIM(STRTRAN(STR(ABS(VAL(b->promodsc)),99,2),".")),10,"0")

jrbbldr: omitting the 2nd parameter is quite alright.

If  ALLTRIM(b->promodsc) was working as stated in the question then b->promodsc must be character.

If indeed the value of   b.promodsc   was a character instead of a numeric (as suggested above by: example promodsc is -4.99)  then by breaking the complex code down to its most simple components in a step-by-step manner would show you specifically where the problem existed.

For example if you should try the following on a Character value, you will get an error message which is telling you that the value cannot be run within the ABS() function.
?ABS(b.promodsc)

Good Luck

If the field type of    b.promodsc   is character, then you obviously do not need to do the Functions which relate to Numeric values.

Instead you can get rid of the minus sign (a character) merely by using STRTRAN() or CHRTRAN()
And you can also get rid of the decimal point (a character) by using STRTRAN() or CHRTRAN()

Good Luck