16.windows coordinate system

1. Coordinate system classification

(1) Device coordinate system-in pixels, the upper-left corner of the device is the origin, X right is positive, and y downward is a positive coordinate system

screen coordinate system: coordinate system with origin in the upper-left corner of the current screen

Window coordinate system: The coordinate system that is the origin of the upper-left corner of the window

Customer area Coordinate system: coordinate system with origin in the upper-left corner of the client area of the window

(2) Logical coordinate system-in GDI drawings, the logical coordinate system is used to draw, and the logical coordinate system can set the coordinate system units

16.windows coordinate system