最大化窗口易语言源码

使用AnimateWindow进行动画显示窗体的加载，窗口开始的时候总是黑色的,VB的程序使用AnimateWindow要在子类中重绘,以下是VB源码：

(大家只要在winuser.h   中，把版本winver   改为   400   is   ok  )

模块：

Option Explicit

Const GWL_WNDPROC = (-4)

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" ( _

ByVal hWnd As Long, _

ByVal nIndex As Long) As Long

Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" ( _

ByVal hWnd As Long, _

ByVal nIndex As Long, _

ByVal dwNewLong As Long) As Long

Const PROP_PREVPROC = "PrevProc"

Const PROP_FORM = "FormObject"

Private Declare Function SetProp Lib "user32" Alias "SetPropA" ( _

ByVal hWnd As Long, _

ByVal lpString As String, _

ByVal hData As Long) As Long

Private Declare Function GetProp Lib "user32" Alias "GetPropA" ( _

ByVal hWnd As Long, _

ByVal lpString As String) As Long

Private Declare Function RemoveProp Lib "user32" Alias "RemovePropA" ( _

ByVal hWnd As Long, _

ByVal lpString As String) As Long

Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" ( _

Dest As Any, _

Src As Any, _

ByVal DestL As Long)

Const WM_PRINTCLIENT = &H318

Private Type RECT

Left As Long

Top As Long

Right As Long

Bottom As Long

End Type

Private Declare Function GetClientRect Lib "user32" ( _

ByVal hWnd As Long, _

lpRect As RECT) As Long

Private Declare Function apiOleTranslateColor Lib "oleaut32" Alias "OleTranslateColor" ( _

ByVal lOleColor As Long, _

ByVal lHPalette As Long, _

lColorRef As Long) As Long

Enum AnimateWindowFlags

    AW_HOR_POSITIVE = &H1

    AW_HOR_NEGATIVE = &H2

    AW_VER_POSITIVE = &H4

    AW_VER_NEGATIVE = &H8

    AW_CENTER = &H10

    AW_HIDE = &H10000

    AW_ACTIVATE = &H20000

    AW_SLIDE = &H40000

    AW_BLEND = &H80000

End Enum

Private Declare Function apiAnimateWindow Lib "user32" Alias "AnimateWindow" ( _

ByVal hWnd As Long, _

ByVal dwTime As Long, _

ByVal dwFlags As Long) As Long

Private Declare Function MulDiv Lib "kernel32" ( _

ByVal Mul As Long, _

ByVal Nom As Long, _

ByVal Den As Long) As Long

Private Declare Function CreateSolidBrush Lib "gdi32" ( _

ByVal crColor As Long) As Long

Private Declare Function BitBlt Lib "gdi32" ( _

ByVal hDestDC As Long, _

ByVal x As Long, _

ByVal y As Long, _

ByVal nWidth As Long, _

ByVal nHeight As Long, _

ByVal hSrcDC As Long, _

ByVal xSrc As Long, _

ByVal ySrc As Long, _

ByVal dwRop As Long) As Long

Private Declare Function GetDC Lib "user32" ( _

ByVal hWnd As Long) As Long

Private Declare Function CreateCompatibleDC Lib "gdi32" ( _

ByVal hDC As Long) As Long

Private Declare Function ReleaseDC Lib "user32" ( _

ByVal hWnd As Long, _

ByVal hDC As Long) As Long

Private Declare Function DeleteDC Lib "gdi32" ( _

ByVal hDC As Long) As Long

Private Declare Function FillRect Lib "user32" ( _

ByVal hDC As Long, _

lpRect As RECT, _

ByVal hBrush As Long) As Long

Private Declare Function DeleteObject Lib "gdi32" ( _

ByVal hObject As Long) As Long

Private Declare Function SelectObject Lib "gdi32" ( _

ByVal hDC As Long, _

ByVal hObject As Long) As Long

Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" ( _

ByVal lpPrevWndFunc As Long, _

ByVal hWnd As Long, _

ByVal Msg As Long, _

ByVal wParam As Long, _

ByVal lParam As Long) As Long

'

' AnimateWindow

'

' Wrapper for AnimateWindow api

'

Public Sub AnimateWindow( _

ByVal Form As Form, _

ByVal dwTime As Long, _

ByVal dwFlags As AnimateWindowFlags)

' Set the properties

SetProp Form.hWnd, PROP_PREVPROC, GetWindowLong(Form.hWnd, GWL_WNDPROC)

SetProp Form.hWnd, PROP_FORM, ObjPtr(Form)

' Subclass the window

SetWindowLong Form.hWnd, GWL_WNDPROC, AddressOf AnimateWinProc

' Call AnimateWindow API

apiAnimateWindow Form.hWnd, dwTime, dwFlags

' Unsubclass the window

SetWindowLong Form.hWnd, GWL_WNDPROC, GetProp(Form.hWnd, PROP_PREVPROC)

' Remove the properties

RemoveProp Form.hWnd, PROP_FORM

RemoveProp Form.hWnd, PROP_PREVPROC

' Refresh the form

'Form.Refresh

End Sub

'

' AnimateWinProc

'

' Window procedure for AnimateWindow

'

Private Function AnimateWinProc( _

ByVal hWnd As Long, _

ByVal Msg As Long, _

ByVal wParam As Long, _

ByVal lParam As Long) As Long

Dim lPrevProc As Long

Dim lForm As Long

Dim oForm As Form

' Get the previous WinProc pointer

lPrevProc = GetProp(hWnd, PROP_PREVPROC)

' Get the form object

lForm = GetProp(hWnd, PROP_FORM)

MoveMemory oForm, lForm, 4&

Select Case Msg

Case WM_PRINTCLIENT

Dim tRect As RECT

Dim hBr As Long

' Get the window client size

GetClientRect hWnd, tRect

' Create a brush with the

' form background color

hBr = CreateSolidBrush(OleTranslateColor(oForm.BackColor))

' Fill the DC with the

' background color

FillRect wParam, tRect, hBr

' Delete the brush

DeleteObject hBr

If Not oForm.Picture Is Nothing Then

Dim lScrDC As Long

Dim lMemDC As Long

Dim lPrevBMP As Long

' Create a compatible DC

lScrDC = GetDC(0&)

lMemDC = CreateCompatibleDC(lScrDC)

ReleaseDC 0, lScrDC

' Select the form picture in the DC

lPrevBMP = SelectObject(lMemDC, oForm.Picture.Handle)

' Draw the picture in the DC

BitBlt wParam, _

0, 0, _

HM2Pix(oForm.Picture.Width), HM2Pix(oForm.Picture.Height), _

lMemDC, 0, 0, vbSrcCopy

' Release the picture

SelectObject lMemDC, lPrevBMP

' Delete the DC

DeleteDC lMemDC

End If

End Select

' Release the form object

MoveMemory oForm, 0&, 4&

' Call the original window procedure

AnimateWinProc = CallWindowProc(lPrevProc, hWnd, Msg, wParam, lParam)

End Function

'

' HM2Pix

'

' Converts HIMETRIC to Pixel

'

Private Function HM2Pix(ByVal Value As Long) As Long

HM2Pix = MulDiv(Value, 1440, 2540) / Screen.TwipsPerPixelX

End Function

'

' OleTranslateColor

'

' Wrapper for OleTranslateColor API

'

Private Function OleTranslateColor(ByVal Clr As Long) As Long

apiOleTranslateColor Clr, 0, OleTranslateColor

End Function

窗体：

Private Sub Form_Load()

    AnimateWindow Me, 1000, AW_BLEND

End Sub