你好,求教vb怎样实现窗体 打开关闭时淡入淡出并慢慢从中心到四周方向扩散的动画效果?

Private Declare Function AnimateWindow Lib "user32" (ByVal hWnd As Long, ByVal mytime As Long, ByVal style As Long) As Boolean

Private Sub Form_Load()
outspread = AnimateWindow(Me.hWnd, 1000, 16)
Me.Refresh
'AnimateWindow 第一个参数是句柄
'AnimateWindow 第二个参数是打开的速度(值越大速度越慢,否则相反)
'AnimateWindow 第三个参数是打开的样式
'说明第三个参数
'0 没有模式
'1 从左向右展开
'2 从右向左展开
'4 从上向下
'5 从左上角到右下角
'6 从右上角到左下角
'8 从下向上
'9 从左下角到右上角
'10 从右下角到左上角
'16 从中间向四边张开
End Sub

这个可以是可以但是展开的时候窗体是黑色的,怎么样才使得展开的时候也是我所设置的窗体背景色???

首先你得有个FORM1,然后添加一个模块,写入下面:
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
''注释:
''注释: AnimateWindow
''注释:
''注释: Wrapper for AnimateWindow api
'注释:
Sub AnimateWindow( _
ByVal Form As Form, _
ByVal dwTime As Long, _
ByVal dwFlags As AnimateWindowFlags)
'注释: Set the properties
SetProp Form.hWnd, PROP_PREVPROC, GetWindowLong(Form.hWnd, GWL_WNDPROC)
SetProp Form.hWnd, PROP_FORM, ObjPtr(Form)
'注释: Subclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, AddressOf AnimateWinProc

'注释: Call AnimateWindow API
apiAnimateWindow Form.hWnd, dwTime, dwFlags

'注释: Unsubclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, GetProp(Form.hWnd, PROP_PREVPROC)
'注释: Remove the properties
RemoveProp Form.hWnd, PROP_FORM
RemoveProp Form.hWnd, PROP_PREVPROC

'注释: Refresh the form
Form.Refresh

End Sub
'注释:
'注释: AnimateWinProc
'注释:
'注释: Window procedure for AnimateWindow
'注释:
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
'注释: Get the previous WinProc pointer
lPrevProc = GetProp(hWnd, PROP_PREVPROC)

'注释: 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
'注释: Get the window client size
GetClientRect hWnd, tRect

'注释: Create a brush with the
'注释: form background color
hBr = CreateSolidBrush(OleTranslateColor(oForm.BackColor))
'注释: Fill the DC with the
'注释: background Color
FillRect wParam, tRect, hBr
'注释: Delete the brush
DeleteObject hBr
If Not oForm.Picture Is Nothing Then
Dim lScrDC As Long
Dim lMemDC As Long
Dim lPrevBMP As Long
'注释: Create a compatible DC
lScrDC = GetDC(0&)
lMemDC = CreateCompatibleDC(lScrDC)
ReleaseDC 0, lScrDC
'注释: Select the form picture in the DC
lPrevBMP = SelectObject(lMemDC, oForm.Picture.Handle)
'注释: Draw the picture in the DC
BitBlt wParam, _
0, 0, _
HM2Pix(oForm.Picture.Width), HM2Pix(oForm.Picture.Height), _
lMemDC, 0, 0, vbSrcCopy
'注释: Release the picture
SelectObject lMemDC, lPrevBMP
'注释: Delete the DC
DeleteDC lMemDC

End If

End Select
'注释: Release the form object
MoveMemory oForm, 0&, 4&
'注释: Call the original window procedure
AnimateWinProc = CallWindowProc(lPrevProc, hWnd, Msg, wParam, lParam)

End Function
'注释:
'注释: HM2Pix
'注释:
'注释: Converts HIMETRIC to Pixel
'注释:
Private Function HM2Pix(ByVal Value As Long) As Long
HM2Pix = MulDiv(Value, 1440, 2540) / Screen.TwipsPerPixelX
End Function
'注释:
'注释: OleTranslateColor
'注释:
'注释: Wrapper for OleTranslateColor API
'注释:
Private Function OleTranslateColor(ByVal Clr As Long) As Long
apiOleTranslateColor Clr, 0, OleTranslateColor
End Function

...........................................................................
在form1的unload里面写入
Private Sub Form_Unload(Cancel As Integer)
AnimateWindow Me, 1000, &H80000 + &H10000
Set Form1 = Nothing
End Sub
...............................运行,关闭看看特效。。窗口隐身而出。。。没有的话,联系我。。呵呵 我是KELVIN,联系我
Private Declare Function AnimateWindow Lib "user32" (ByVal hwnd As Long, ByVal dwTime As Long, ByVal dwFlags As Long) As Long

其中:
hwnd只对Form有效,其他像Picture1都无法产生效果。
dwTime是动画持续的时间,默认为200。
dwFlags可取以下值:
AW_HOR_POSITIVE ( &H1 ) '从左到右打开窗口
AW_HOR_NEGATIVE ( &H2 ) '从右到左打开窗口
AW_VER_POSITIVE ( &H4 ) '从上到下打开窗口
AW_VER_NEGATIVE ( &H8 ) '从下到上打开窗口
AW_CENTER ( &H10 ) '看不出任何效果
AW_HIDE (&H10000) '在窗体卸载时若想使用本函数就得加上此常量
AW_ACTIVATE (&H20000) '在窗体通过本函数打开后,默认情况下会失去焦点,除非加上本常量
AW_SLIDE (&H40000) '看不出任何效果
AW_BLEND (&H80000) '淡入淡出效果
温馨提示:答案为网友推荐,仅供参考
相似回答