Hello! I hope this is the correct forum for my question. Lets start... i am developing an e-learning programm for handicaped kids with a friend. Everything works great but now we need to make it more felxible. For instance we have an function which generates from strings numbers. GenerateNumber("TH") --> 1800, 8400, 6900,... GenerateNumber("TE") --> 7004, 2005, 8001,... Now there are higher functions like AddAndSubtract. AddAndSubtract("ZE", "E", "HE") --> 95 + 8 = 103 | 108 - 9 = 99 As you see here AddAndSubtract calls GenerateNumber. Now i need a solution for these problems. 1. Defining the range of a number: GenerateNumber("TH") [Range between 1000 and 3000]--> 1800, 2300, 1900,... 2. Defining the order of the calulations: AddAndSubtract("ZE{a/b}", "E{b/c}", "HE{c/a}") --> a b c a b c 95 + 8 = 103 | 108 - 99 = 9 Is there an solution witch uses a scripting language? Or what would you do? Thanks, Christian