Load your data into an array, then use SetTableCellRangeVals() to update the UIR table control with the data from the array. If all the data in the table needs to be updated, set the range to VAL_TABLE_ENTIRE_RANGE. If a subset of the table needs to be updated, define a rectangle big enough to hold the updated data.
SetTableCellRangeVals (panel, control, VAL_TABLE_ENTIRE_RANGE, yourArray, VAL_ROW_MAJOR);
Look at the online help for SetTableCellRangeVals().
Look at the sample program gridview.prj that ships with CVI. The GenDataToTable() function generates the data in an array, then writes it to the UIR table control.