Private Declare Function SetPixelV Lib "gdi32" (ByVal hDC As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As Byte
Private Declare Function GetPixel Lib "gdi32" (ByVal hDC As Long, ByVal x As Long, ByVal y As Long) As Long
Private Sub CmdBrightness_Click()
'variables for brightness, color calculation, positioning
Dim Brightness As Single
Dim NewColor As Long
Dim x, y As Integer
Dim r, g, b As Integer
'change the brightness to a percent
Brightness = TxtBrightness / 100
'run a loop through the picture to change every pixel
For x = 0 To Picture1.ScaleWidth
For y = 0 To Picture1.ScaleHeight
'get the current color value
NewColor = GetPixel(Picture1.hDC, x, y)
'extract the R,G,B values from the long returned by GetPixel
r = (NewColor Mod 256)
b = (Int(NewColor / 65536))
g = ((NewColor - (b * 65536) - r) / 256)
'change the RGB settings to their appropriate brightness
r = r * Brightness
b = b * Brightness
g = g * Brightness
'make sure the new variables aren't too high or too low
If r > 255 Then r = 255
If r < 0 Then r = 0
If b > 255 Then b = 255
If b < 0 Then b = 0
If g > 255 Then g = 255
If g < 0 Then g = 0
'set the new pixel
SetPixelV Picture1.hDC, x, y, RGB(r, g, b)
'continue through the loop
Next y
'refresh the picture box every 10 lines (a nice progress bar effect)
If x Mod 10 = 0 Then Picture1.Refresh
Next x
'final picture refresh
Picture1.Refresh
End Sub
احتیاج دارید که متن درون آن به درصد برابر میزان روشنایی استTxtBrightnessیک کادر متن به نامCmdBrightnessحال کردین با توضیحات کامل برای کد بالا یک کامند به نام
