|
Check Boxes
A check box consists of a square box and application-defined text (label), an icon, or a
bitmap that indicates a choice the user can make by selecting the button.
Applications typically display check boxes in a group box to permit the user to
choose from a set of related, but independent options. For example, an application
might present a group of check boxes from which the user can select error
conditions that produce warning beeps.
A check box can be one of four styles: standard, automatic, three-state, and
automatic three-state, as defined by the constants BS_CHECKBOX, BS_AUTOCHECKBOX,
BS_3STATE, and BS_AUTO3STATE, respectively. Each style can assume two check
states: checked (an check mark inside the box) or unchecked (no check mark). In
addition, a three-state check box can assume an indeterminate state (a grayed
box inside the check box). Repeatedly selecting a standard or automatic check box
toggles it from checked to unchecked and back again. Repeatedly selecting a
three-state check box toggles it from checked to unchecked to indeterminate and
back again.
When the user selects a check box (of any style), the check box receives the
keyboard focus from Windows, which sends the check box's parent window a WM_COMMAND message containing the BN_CLICKED notification code. The parent window doesn't acknowledge this message if it
comes from an automatic check box or automatic three-state check box, because
Windows automatically sets the check state for those styles. But the parent
window must acknowledge the message if it comes from a check box or three-state
check box because the parent window, not Windows, is responsible for setting the
check state for those styles. Regardless of the check box style, Windows
automatically repaints the check box once its state is changed.
| 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
|
