Need function modules

Hi all,

I need funtion module in solution manager system ( not in R/3 ) to,

1.) Calculate number of days, hours and minutes between two dates and time.

I got this FM '/SDF/CMO_DATETIME_DIFFERENCE' but it is not showing difference in terms of

minutes

So i need some other FM.

2.) To calculate working days or holidays between two dates . This too i need in solution manager not in R/3. In R/3 i am able to find many fm's, but they r not in solution manager system.

Help in this.

Regard's

Jean.