I am creating a windows application and have a groupbox on my form. Few controls are created at runtime and are placed on this groupbox. Now i need to select multiple controls at runtime by just clicking and dragging the mouse as allowed in Windows operating system. As of now, i am doing by clicking on the each controls, but i want to use my mouse to select many controls together by just clicking and dragging the mouse towards the controls that need to be selected. This is very much important for my project and i would like to express my thanks in advance for all the comments.