Developing a search screen [C# windows application]

Question

hi, i have a two panels on a winorm one is "FIND CRITERIA" and the second is "FOUND DATA", what i want to do is to write a simple sql that can take argument , because their are 8 different search criterias that a user can enter in order to refine a search. 1. date 2. number 3. account now the user can enter the all three or either one of the above as soon as the input parameterz increase the search should be refined . thanks in advance any help