TMycontrol = class( TCustomControl )
procedure Paint; override;
I place two such controls on the panel and look how they receive keyboard messages (I use WinSpy). What do I see:
When I click the button one control receive WM_KEYUP and other receive WM_KEYDOWN, on the next click first one receive WM_KEYDOWN and second one WM_KEYUP.
The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work. Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…