Is there any way to make a control transparent like button, edit, panel or etc...? I mean something like capacity or alpha blend that we have in form property.
alpha is usually the first 2 digits in a hex number....
typical hex is #FFFFFF a hex with opacityinformation is #FFFFFFFF which would be white at full opacity #00FFFFFF would be white at 0 opacity...
you should also be able to set the background to transparent. If you are looking to make the whole control disappear you can simply hide it...what are you trying to achieve?
Take a look at the Win32 windows styles, especially WS_TRANSPARENT (or WS_EX_TRANSPARENT).
I don't think you can make components transparent through a property (in my very little experience), except for those components which you can choose 'none' as a color(usually you have to download these). For instance TAdvSmoothPanel, but its transparency has limits.
You should try googling Delphi transparent components, there are downloadable components and tricks you can do to make existing components transparent.