Hi,

How can I print a value that is calculated in the UDF? Something with print command in the UDF?

Thank you.

print in file or on screen? There are of course other and maybe better possibilities but within my UDF's it works.

screen: Message0("Your Text %20.13e \n", Variable); %20.13e is the format for the value that would be written at this place. 20 is the whole length and 13 is the amount of numbers after . and e means it is written in 3.0000000000000e-03 for example. You can also use %f for a float number or %i for an integer. \n is End of line

file: File *pointer_to_file; pointer_to_file = fopen("test.dat", "w"); fprintf(pointer_to_file, "Text in file %20.13e \n", Variable); fclose(pointer_to_file);