Changes the luminance of a RGB value.
#Include <WinAPIEx.au3>
_WinAPI_ColorAdjustLuma ( $iRGB, $iPercent [, $fScale] )
| $iRGB | The initial RGB value. |
| $iPercent | The luminance of the total range, in percent, or absolute luminance. |
| $fScale | [可选参数] Specifies how to use the $iPercent parameter, valid values: TRUE - The $iPercent specifies how much to increment or decrement the current luminance, $iPercent can range from -1000 to +1000. FALSE - The $iPercent specifies the absolute luminance, $iPercent can range 0 to 1000. Available luminance values range from 0 to a maximum. If the requested value is negative or exceeds the maximum, the luminance will be set to either zero or the maximum value, respectively. |
| Success | The modified RGB value. |
| Failure | (-1) and sets the @error flag to non-zero. |
在MSDN中搜索
#Include <APIConstants.au3>
#Include <GUIConstantsEx.au3>
#Include <SliderConstants.au3>
#Include <StaticConstants.au3>
#Include <WinAPIEx.au3>
Opt('MustDeclareVars', 1)
Global $hForm, $Graphic, $Label, $hSlider, $Slider
; Create GUI
$hForm = GUICreate('MyGUI', 300, 327)
GUISetBkColor(0x808080)
$Graphic = GUICtrlCreateGraphic(0, 0, 150, 300)
GUICtrlSetBkColor(-1, 0x808080)
GUICtrlCreateLabel('', 0, 300, 303, 2, $SS_ETCHEDHORZ)
$Label = GUICtrlCreateLabel('0%', 30, 132, 90, 37, $SS_CENTER)
GUICtrlSetFont(-1, 24, 800, 0, 'Arial')
GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT)
GUICtrlSetColor(-1, 0xFFFFFF)
$Slider = GUICtrlCreateSlider(0, 302, 300, 25, BitOR($TBS_BOTH, $TBS_NOTICKS))
$hSlider = GUICtrlGetHandle(-1)
GUICtrlSetLimit(-1, 50, -50)
GUICtrlSetData(-1, 0)
; Register WM_HSCROLL message for live scrolling and show GUI
GUIRegisterMsg($WM_HSCROLL, 'WM_HSCROLL')
GUISetState()
Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE
Func WM_HSCROLL($hWnd, $iMsg, $wParam, $lParam)
Local $Percent
Switch $hWnd
Case $hForm
Switch $lParam
Case $hSlider
$Percent = GUICtrlRead($Slider)
GUICtrlSetBkColor($Graphic, _WinAPI_ColorAdjustLuma(0x808080, $Percent))
GUICtrlSetData($Label, $Percent & '%')
EndSwitch
EndSwitch
Return $GUI_RUNDEFMSG
EndFunc ;==>WM_HSCROLL