Function Reference

_WinAPI_LineTo

Draws a line from the current position up to, but not including, the specified point.

#include <WinAPI.au3>
_WinAPI_LineTo($hDC, $iX, $iY)

Parameters

$hDC	Handle to device context
$iX	X coordinate of the line's ending point.
$iY	Y coordinate of the line's ending point.

Return Value

Success:	True
Failure:	False

Remarks

The line is drawn by using the current pen and, if the pen is a geometric pen, the current brush.
If LineTo succeeds, the current position is set to the specified ending point.

_WinAPI_MoveTo, _WinAPI_DrawLine, _WinAPI_SelectObject, _WinAPI_CreatePen

Example

#include <WindowsConstants.au3>
#include <WinAPI.au3>

ShowCross(@DesktopWidth / 2, @DesktopHeight / 2, 20, 2, 0xFF, 3000)

Func ShowCross($start_x, $start_y, $length, $width, $color, $time)
Local $hDC, $hPen, $obj_orig

$hDC = _WinAPI_GetWindowDC(0) ; DC of entire screen (desktop)
$hPen = _WinAPI_CreatePen($PS_SOLID, $width, $color)
$obj_orig = _WinAPI_SelectObject($hDC, $hPen)

_WinAPI_DrawLine($hDC, $start_x - $length, $start_y, $start_x - 5, $start_y) ; horizontal left
_WinAPI_DrawLine($hDC, $start_x + $length, $start_y, $start_x + 5, $start_y) ; horizontal right
_WinAPI_DrawLine($hDC, $start_x, $start_y - $length, $start_x, $start_y - 5) ; vertical up
; _WinAPI_DrawLine($hDC, $start_x, $start_y + $length, $start_x, $start_y + 5) ; vertical down
_WinAPI_MoveTo($hDC, $start_x, $start_y + $length)
_WinAPI_LineTo($hDC, $start_x, $start_y + 5)

Sleep($time) ; show cross over screen for defined seconds

; refresh desktop (clear cross)
_WinAPI_RedrawWindow(_WinAPI_GetDesktopWindow(), 0, 0, $RDW_INVALIDATE + $RDW_ALLCHILDREN)

; clear resources
_WinAPI_SelectObject($hDC, $obj_orig)
_WinAPI_DeleteObject($hPen)
_WinAPI_ReleaseDC(0, $hDC)
EndFunc ;==>ShowCross