通过

CDC::DPtoLP

  • 项目

Converts device units into logical units.

void DPtoLP(
   LPPOINT lpPoints,
   int nCount = 1 
) const;
void DPtoLP(
   LPRECT lpRect 
) const;
void DPtoLP(
   LPSIZE lpSize 
) const;

Parameters

  • lpPoints
    Points to an array of POINT structures or CPoint objects.

  • nCount
    The number of points in the array.

  • lpRect
    Points to a RECT structure or CRect object. This parameter is used for the simple case of converting one rectangle from device points to logical points.

  • lpSize
    Points to a SIZE structure or CSize object.

Remarks

The function maps the coordinates of each point, or dimension of a size, from the device coordinate system into GDI's logical coordinate system. The conversion depends on the current mapping mode and the settings of the origins and extents for the device's window and viewport.

Requirements

Header: afxwin.h

See Also

Concepts

CDC Class

CDC Members

Hierarchy Chart

CDC::LPtoDP

CDC::HIMETRICtoDP

DPtoLP

POINT Structure

RECT Structure

CDC::GetWindowExt

CDC::GetWindowOrg