I can think of a couple ways to do what you want.
Since there is no native CVI function that operates on a group of controls and permits changing an attribute with an increment instead of an absolute value, you could simply iterate on a for loop that scans a series of elements and, for each one, gest the left and/or top attribute and sets it with the desired increment.
This could be made easier if you load an array of control IDs and use array elements inside the loop, or by using Lists from the Programmer's Toolbox; the looping could also be dramatically speeded up by creating a control array and operating on its items.
An alternative way to solve this problem is to create a splitter on the panel to which attach desired controls setting "Splitter moves control" as the attachment mode for each of them. The splitter could then be made invisible if you want to move controls programmatically and operated with OperateSplitter (). See uirview.cws and docking.cws examples that demonstrate the use of the command.
The limit to this method is that you can only move controls leftwise of rightwise if you use a vertical splitter, and upward and downward if you use an horizontal splitter.
