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AnimateWindow
Declare Function AnimateWindow Lib "user32" alias "AnimateWindow" _
(ByVal hwnd As Long, ByVal dwTime As Long, ByVal dwFlags As Long) As long

'------------------------------------------------------------------------------|
' hwnd               Handle to the window to animate. The calling thread must  |
'                    own this window.                                          |
'                                                                              |
' dwTime             Specifies how long it takes to play the animation, in     |
'                    milliseconds. Typically, an animation takes 200           |
'                    milliseconds to play.                                     |
'                                                                              |
' dwFlags            Specifies the type of animation. This parameter can be one|
'                    or more of the following values.                          |
'                                                                              |
' AW_SLIDE           Uses slide animation. By default, roll animation is used. |
'                    This flag is ignored when used with AW_CENTER.            |
'                                                                              |
' AW_ACTIVATE        Activates the window. Do not use this value with AW_HIDE. |
'                                                                              |
' AW_BLEND           Uses a fade effect. This flag can be used only if hwnd is |
'                    a top-level window.                                       |
'                                                                              |
' AW_HIDE            Hides the window. By default, the window is shown.        |
'                                                                              |
' AW_CENTER          Makes the window appear to collapse inward if AW_HIDE is  |
'                    used or expand outward if the AW_HIDE is not used.        |
'                                                                              |
' AW_HOR_POSITIVE    Animates the window from left to right. This flag can be  |
'                    used with roll or slide animation. It is ignored when used|
'                    with AW_CENTER or AW_BLEND.                               |
'                                                                              |
' AW_HOR_NEGATIVE    Animates the window from right to left. This flag can be  |
'                    used with roll or slide animation. It is ignored when used|
'                    with AW_CENTER or AW_BLEND.                               |
'                                                                              |
' AW_VER_POSITIVE    Animates the window from top to bottom. This flag can be  |
'                    used with roll or slide animation. It is ignored when used|
'                    with AW_CENTER or AW_BLEND.                               |
'                                                                              |
' AW_VER_NEGATIVE    Animates the window from bottom to top. This flag can be  |
'                    used with roll or slide animation. It is ignored when used|
'                    with AW_CENTER or AW_BLEND.                               |
'------------------------------------------------------------------------------|

'------------------------------------------------------------------------------|
' If the function succeeds, the return value is nonzero.                       |
' If the function fails, the return value is zero. The function will fail in   |
' the following situations:                                                    |
'                                                                              |
' The window uses the window region.                                           |
' The window is already visible and you are trying to show the window.         |
' The window is already hidden and you are trying to hide the window.          |
' To get extended error information, call the GetLastError function.           |
'------------------------------------------------------------------------------|

Const AW_HOR_POSITIVE = &H1 'Animates the window from left to right. This flag can be used with roll or slide animation.
Const AW_HOR_NEGATIVE = &H2 'Animates the window from right to left. This flag can be used with roll or slide animation.
Const AW_VER_POSITIVE = &H4 'Animates the window from top to bottom. This flag can be used with roll or slide animation.
Const AW_VER_NEGATIVE = &H8 'Animates the window from bottom to top. This flag can be used with roll or slide animation.
Const AW_CENTER = &H10 'Makes the window appear to collapse inward if AW_HIDE is used or expand outward if the AW_HIDE is not used.
Const AW_HIDE = &H10000 'Hides the window. By default, the window is shown.
Const AW_ACTIVATE = &H20000 'Activates the window.
Const AW_SLIDE = &H40000 'Uses slide animation. By default, roll animation is used.
Const AW_BLEND = &H80000 'Uses a fade effect. This flag can be used only if hwnd is a top-level window.


'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Start of demo code ~~~~~~~~~~~~~~~
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


declare sub showchild
declare sub hidechild

dim parentform as qform
parentform.center

dim b as qbutton
with b
.parent = parentform
.onclick = showchild
end with

dim childform as qform
childform.parent = parentform
childform.onclose = hidechild


parentform.showmodal

sub showchild
animatewindow(childform.handle, 400, AW_ROLL OR AW_VER_POSITIVE)
childform.show    ' It's needed to make the bordericons work
end sub

sub hidechild
animatewindow(childform.handle, 400, AW_HIDE OR AW_ROLL OR AW_VER_NEGATIVE)
childform.close    ' Needed (see above)
end sub

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