To add it to your application at design time, from the System property page of the Component Palette, click Timer The timer in VCL applications is made available through the TTimer class.
Change the properties of the new Shape to:.On the form, click the Panel and press Ctrl + V.On the form, click the red circle and press Ctrl + C.Change the properties of the new shape as follows:.Click the panel on the form and ress Ctrl + V again.While the new shape is still selected, change its Left value to 8 and its Top value to 136.Click an empty area on the panel to select it and press Ctrl + V.While the new Shape is still selected, change its Left value to 8 and its Top value to 72.Click anywhere on the panel to select it.Press Ctrl + C to copy it to the clipboard On the panel, click the newly added Shape to make sure it is selected.Change the following properties for the new Shape:.While the panel is still selected on the form, from the Additional tab of the Component Palette, double-click the Shape control.Change the properties of the panel as follows:.From the Statndard tab of the Component Palette, double-click the Panel control.Change its dimensions to Height = 256 and Width = 112.Change its BorderStyle property to bsDialog.Change the Caption of the form to Traffic Light.Save the unit as Exercise and save the project as TrafficLight.Save it in a new folder named TrafficLight1.
#Borland c how to#
As a programmer, you decide if, why, when, and how to use this control. Users do not see nor do they use a timer as a control. The message is something to the effect of "I have counted the number of lapses you asked me to count".Īs opposed to the time that controls your computer, a timer is partly but greatly under your control. To work, every lapse of period, the control sends a message to the operating system. A timer is a non-spatial object that uses recurring lapses of time in a computer or in your application.
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