函数参考

_WinAPI_SelectObject

选择指定设备环境的对象

#Include <WinAPI.au3>
_WinAPI_SelectObject($hDC, $hGDIObj)

参数

$hDC 设备环境的标识
$hGDIObj 选中对象的标识

返回值

成功: 返回取代对象的句柄
失败: 返回值 <= 0

注意/说明

None.

相关

_WinAPI_CreatePen, _WinAPI_DrawLine, _WinAPI_GetBkMode, _WinAPI_LineTo, _WinAPI_MoveTo, _WinAPI_SetBkMode

详情参考

在MSDN中搜索


示例/演示


#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) ; 全屏场景(桌面)
    $hPen = _WinAPI_CreatePen($PS_SOLID, $width, $color)
    $obj_orig = _WinAPI_SelectObject($hDC, $hPen)

    _WinAPI_DrawLine($hDC, $start_x - $length, $start_y, $start_x - 5, $start_y) ; 水平向左
    _WinAPI_DrawLine($hDC, $start_x + $length, $start_y, $start_x + 5, $start_y) ; 水平向右
    _WinAPI_DrawLine($hDC, $start_x, $start_y - $length, $start_x, $start_y - 5) ; 垂直向上
    ;_WinAPI_DrawLine($hDC, $start_x, $start_y + $length, $start_x, $start_y + 5) ; 垂直向下
    _WinAPI_MoveTo($hDC, $start_x, $start_y + $length)
    _WinAPI_LineTo($hDC, $start_x, $start_y + 5)

    Sleep($time) ; 越屏显示定义的秒数

    ; 刷新桌面 (清除穿越)
    _WinAPI_RedrawWindow(_WinAPI_GetDesktopWindow(), 0, 0, $RDW_INVALIDATE + $RDW_ALLCHILDREN)

    ; 清理资源
    _WinAPI_SelectObject($hDC, $obj_orig)
    _WinAPI_DeleteObject($hPen)
    _WinAPI_ReleaseDC(0, $hDC)
EndFunc   ;==>ShowCross