algorithm windows dc handle system HWND selectObject Device Contexts

 algorithm windows dc handle system HWND selectObject Device Contexts

https://learn.microsoft.com/zh-tw/cpp/mfc/relationship-between-a-cpp-window-object-and-an-hwnd?view=msvc-170

capable of drawing lines, arrows, rectangles, and ellipses. It is also capable of writing and editing text, cut-and-paste figures as well as saving and loading the drawings. The following screenshot depicts a classic example of the Draw Application:

https://learn.microsoft.com/en-us/windows/win32/gdi/using-filled-shapes
https://www.codeproject.com/articles/1698/ms-spy-style-window-finder?fid=3083&df=90&mpp=25&prof=true&sort=position&view=normal&spc=relaxed&fr=26
https://www.codeproject.com/Articles/8216/Writing-Win32-Apps-with-C-V2-part-1
https://www.codeproject.com/Articles/1944/Guide-to-WIN32-Regions

windows mouse  notification system  region pointer grab cursor HDC Handle of Window Handle to Device Context
http://www.cs.sjsu.edu/~pearce/modules/lectures/mfc/chp4/chapter4.htm
https://stackoverflow.com/questions/72566733/how-to-highlight-mouse-pointer-position-using-delphi
https://stackoverflow.com/questions/66848052/how-capture-only-the-region-of-mouse-click-on-screen

https://www.hiramine.com/programming/modelvieweropenglwinapi2008/01_base.html
http://uglab.blog23.fc2.com/blog-entry-110.html
http://www.kab-studio.biz/Programing/Codian/MxA/05.html
https://claybird.sakura.ne.jp/tips/gl_01/index.html

algorithm microwindows windows  select Object

algorithm microwindows windows  select   Handle  Device Contex
https://www.researchgate.net/figure/Sliding-window-algorithm-explanation_fig1_228753893
https://www.informit.com/articles/article.aspx?p=30009&seqNum=4
windows hdc Handle Device Context area mouse click event

gui win system mouse cursor pointer get windows controls handle algorithm search HDC Region
https://www.codeproject.com/Articles/5178828/The-Explorer-Imperative-Two-Stage-Search
https://learn.microsoft.com/en-us/windows/win32/learnwin32/painting-the-window
gui win  mouse cursor handle algorithm search HDC Region
region gui screen region selector

https://github.com/country-regions/react-country-region-selector#demo
gui  Regions  custom region selection SelectObject Polygonal Region Structures
https://github.com/SerpentAI/SerpentAI/wiki/Defining-Screen-Regions

x-window screen region selection
    Xlib Pointer Grabbing
         XGrabKeyboard  XGrabPointer
         region pointer grabbing
https://tronche.com/gui/x/xlib/input/XGrabKeyboard.html
 xlib xgrabpointer
x-window screen region selection
https://en.wikipedia.org/wiki/X_Window_System_protocols_and_architecture
https://en.wikipedia.org/wiki/X_Window_selection
https://en.wikipedia.org/wiki/Selection_(user_interface)

https://github.com/search?q=x-window+screen+region+selection+language%3AC++path%3A%2F%5EPsychSourceGL%5C%2FSource%5C%2FLinux%5C%2FScreen%5C%2F%2F&type=code

https://hackage.haskell.org/
https://github.com/c-koi/libboard
https://www.freebsdsoftware.org/graphics/
https://github.com/FreeCAD/FreeCAD/tree/b239797b3e4d2c5fdbc653ae5c150309a73b4474/src/3rdParty/libkdtree/kdtree%2B%2B
Blend2D  vector graphics libraries Grab Cursor screen region selection Pointer Grabbing vector graphics grabbing
repo:inanevin/LinaVG Cursor
https://github.com/search?q=repo%3Ainanevin%2FLinaVG+Cursor+&type=code

RectInRegion  判斷指定矩形的任何部分是否在區域的界限內。
https://learn.microsoft.com/zh-tw/windows/win32/api/wingdi/nf-wingdi-rectinregion
https://github.com/MicrosoftDocs/win32/blob/docs/desktop-src/gdi/region-functions.md
BOOL WINAPI RectInRegion( HRGN hrgn, const RECT *rect )
https://learn.microsoft.com/zh-tw/windows/win32/gdi/region-functions
https://learn.microsoft.com/zh-tw/windows/win32/api/wingdi/nf-wingdi-selectobject

OBJ_REGION
https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Graphics/Gdi/constant.OBJ_REGION.html
https://learn.microsoft.com/zh-tw/windows/win32/api/wingdi/nf-wingdi-getobjecttype
https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getwindowrgn
https://github.com/Guy1524/wine/blob/easy-anti-cheat/dlls/gdi32/region.c#L673
WINEREGION gdi