|
Parent Display Device Contexts
A parent DC enables an application to minimize the time necessary to set up the clipping
region for a window. An application typically uses parent DCs to speed up
drawing for control windows without requiring a private or class DC. For example,
Windows uses parent DCs for push button and edit controls. Parent DCs are
intended for use with child windows only, never with top-level or pop-up windows.
An application can specify the CS_PARENTDC style to set the clipping region of
the child window to that of the parent window so that the child can draw in
the parent. Specifying CS_PARENTDC enhances an application's performance because
Windows doesn't need to keep recalculating the visible region for each child
window.
Attribute values set by the parent window are not preserved for the child
window; for example, the parent window cannot set the brush for its child windows.
The only property preserved is the clipping region. The window must clip its
own output to the limits of the window. Because the clipping region for the
parent DC is identical to the parent window, the child window can potentially draw
over the entire parent window, but the parent DC must not be used in this way.
Windows ignores the CS_PARENTDC style if the parent window uses a private or
class DC, if the parent window clips its child windows, or if the child window
clips its child windows or sibling windows.
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
