From the Scripting Manual
function WriteFile(FileName, Data: string): boolean; Parameter Info: FileName (String): File located in your Soldat Server folder. Data (String): Text to be written to FileName. Description: This function will write a file (FileName) located in your Soldat Server folder and return TRUE if successful, and FALSE if an error occured.
begin WriteFile('test.txt','Hello World!'); WriteLn(ReadFile('test.txt')); //Outputs "Hello World!" end;