InForm-PE

[TempodiBasic]

Hi Kernelpanic
maybe we have lost in translations
in the 2 screenshots that you have posted above in your post #115 I see that you are trying to assign something_that_is_more_than_a_digit to a digit!
Control(numErgebnis).value is a number whose edge have been set at design time.
I think  that 

Code: (Select All)

 Number = "###.##", Numeric_formula   '<--- wrong syntax

Number = ("###.##", Numeric_Formula)   '<--- wrong syntax

Number = Numeric_Formula '<-- correct syntax

you can substitute Number with Control(numErgebnis).Value  and Numeric_Formula with ((2 * (Control(numKolbenhub).Value) * Control(numDrehzahl).Value) / 60 * 100) but we cannot assign something else than a number to a number variable.

if your goal is to get back from the formula a number that has the format ###.##, I think you must do this by code. and show it in a string.
So it is useful to use for result a Label at the place of the third textbox that will be never used as input tool. 
But if you like to use a textbox please make calculation before , then convert your result to a string with the right kind of output and at the end assign this last string to the textbox string.
Remember that surely there are some inner checks about the controls that are invisible to the user.