How to simulate a control like a form (title bar, focus, drag, change size, close, etc.)

zhaozj2021-02-11  163

It has seen such controls for the SQL Server view design or Access query design, and the control of the control is a form, there is a border, title bar, icon, shutdown button, drag, change, etc.

I was doing a custom query for a long time, I want to make the interface as the design view of SQL Server, I finally found some information in MSDN.

Some URLs of MSDN (change the MSDN installation path to your own path):

MK: @msitstore: d: /program files/MICROSOFT Visual studio/msdn/2001jan/1033/winui.chm :: / hh / winui / mousinpt_7ik4.htm

MK: @msitstore: d: /program files/MICROSOFT Visual studio/msdn/2001jan/1033/winui.chm :: / hh / winui / mousinpt_6085.htm

First, add a USER Control, the control structure is as follows

VERSION 5.00Begin VB.UserControl TableView AutoRedraw = -1 'True ClientHeight = 4260 ClientLeft = 0 ClientTop = 0 ClientWidth = 3855 EditAtDesignTime = -1' True KeyPreview = -1 'True ScaleHeight = 4260 ScaleWidth = 3855 Begin VB.PictureBox picTitle BackColor = & H80000003 & BorderStyle = 0 'None Height = 315 Left = 120 ScaleHeight = 315 ScaleWidth = 2715 TabIndex = 1 Top = 120 Width = 2715 Begin VB.Image imgClose Height = 210 Index = 1 Left = 2400 Picture = "TableView.ctx": 0000 TOP = 0 width = 240 End begin vb.image imgtitle height = 180 left = 60 Picture = "TableView.ctX": 02E2 TOP = 60 Width = 180 End Begin VB.Image imgClose Height = 210 Index = 0 Left = 1560 Picture = "TableView.ctx": 04D4 Top = 0 Width = 240 End Begin VB.Label lblTitle BackColor = & H80000003 & BeginProperty Font Name = "MS Sans Serif "Size = 8.25 charset =

0 Weight = 700 Underline = 0 'False Italic = 0' False Strikethrough = 0 'False EndProperty ForeColor = & H8000000F & Height = 255 Left = 240 TabIndex = 3 Top = 120 Width = 1995 End End Begin VB.ListBox lstColumn Height = 1275 IntegralHeight = 0 'False ItemData = "TableView.ctx": 07B6 Left = 360 List = "TableView.ctx": 07B8 OLEDragMode = 1' Automatic OLEDropMode = 1 'Manual Style = 1' Checkbox TabIndex = 0 TabStop = 0 'False Top = 600 Width = 2175 end begin vb.commandbutton cmdback heiGHT = 2655 left = 0 TabINDEX = 2 tabstop = 0 'False Top = 0 Width = 2895 EndEndAttribute VB_Name = "TableView" Attribute VB_GlobalNameSpace = FalseAttribute VB_Creatable = TrueAttribute VB_PredeclaredId = FalseAttribute VB_Exposed = False II Statement

'WM_NCHITTEST and MOUSEHOOKSTRUCT Mouse Position CodesConst HTERROR = (-2) Const HTTRANSPARENT = (-1) Const HTNOWHERE = 0Const HTCLIENT = 1Const HTCAPTION = 2Const HTSYSMENU = 3Const HTGROWBOX = 4Const HTSIZE = HTGROWBOXConst HTMENU = 5Const HTHSCROLL = 6Const HTVSCROLL = 7Const HTMINBUTTON = 8Const HTMAXBUTTON = 9Const HTLEFT = 10Const HTRIGHT = 11Const HTTOP = 12Const HTTOPLEFT = 13Const HTTOPRIGHT = 14Const HTBOTTOM = 15Const HTBOTTOMLEFT = 16Const HTBOTTOMRIGHT = 17Const HTBORDER = 18Const HTREDUCE = HTMINBUTTONConst HTZOOM = HTMAXBUTTONConst HTSIZEFIRST = HTLEFTConst HTSIZELAST = HTBOTTOMRIGHTConst WM_SIZE = & H5

Const wm_nclbuttondown = & ha1const htcaption = 2const WM_Close = & H10

Const WM_LBUTTONDOWN = & H201Const MK_LBUTTON = & H1Const WM_MOUSEMOVE = & H200Private Declare Function ReleaseCapture Lib "user32" () As LongPrivate Declare Function SendMessage Lib "user32" Alias ​​"SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As ANY) AS Long

Third, code

'Drag Private Sub picTitle_MouseDown (Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 1 Then ReleaseCapture SendMessage UserControl.hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0 & End IfEnd Sub

Private Sub UserControl_Resize () On Error Resume Next CloseBt = True cmdBack.left = 0 cmdBack.width = UserControl.width cmdBack.top = 0 cmdBack.height = UserControl.height picTitle.left = 60 picTitle.top = 60 picTitle.width = UserControl.Width - 150 Pictitle.height = 255 imgclose (0) .top = 30 imgclose (0) .left = Pictitle.Width - 240 imgclose (0) .visible = closebt imgclose (1) .top = 30 imgclose (1) .left = picTitle.width - 240 imgClose (1) .Visible = (Not CloseBt) lstColumn.left = 60 lstColumn.top = picTitle.height 60 lstColumn.width = UserControl.width - lstColumn.left - 60 lstColumn.height = UserControl.height - lstColumn.top - 60 lblTitle.top = 60 lblTitle.left = 300 lblTitle.width = picTitle.width - 720End SubPrivate Sub cmdBack_MouseDown (Button As Integer, Shift As Integer, X As Single, Y As Single) Dim mvDir AS Integer if button <> 1 THEN EXIT SUB ReleaseCapture IF (x <= 60 and y <= 60) Then mvDir = HTTOPLEFT ElseIf (cmdBack.width - X <= 60 And cmdBack.height - Y <= 60) Then mvDir = HTBOTTOMRIGHT ElseIf (X <= 60 And cmdBack.height - Y <= 60) Then mvDir = HTBOTTOMLEFT Elseif (Y <= 60 and cmdback.width - x <= 60) Then mvdir = httopright elseif y <= 60 and x> 60 and cmdback.width - x> 60 Then mvdir = httop elseif cmdback.Height - Y <= 60 And x> 60 and cmdback.width - x> 60 kil = htbottom elseif x <= 60 and y> 60 and cmdback.height - y>

60 Then mvDir = HTLEFT ElseIf cmdBack.width - X <= 60 And Y> 60 And cmdBack.height - Y> 60 Then mvDir = HTRIGHT End If SendMessage UserControl.hwnd, WM_NCLBUTTONDOWN, mvDir, 0 & SendMessage UserControl.hwnd, WM_SIZE, 0 , 0 UserControl_Resize lstColumn.SetFocusEnd SubPrivate Sub cmdBack_MouseMove (Button As Integer, Shift As Integer, X As Single, Y As Single) If (X <= 60 And Y <= 60) Then cmdBack.MousePointer = 8 ElseIf (cmdBack.width - X <= 60 and cmdback.Height - Y <= 60) Then cmdback.mousepointer = 8 elseif (x <= 60 and cmdback.height - y <= 60) Then cmdback.mousepointer = 6 elseif (Y <= 60 and cmdback .width - x <= 60) THEN cmdback.mousepointer = 6 elseif y <= 60 and x> 60 and cmdback.width - x> 60 Ten cmdback.mousepointer = 7 elseif cmdback.Height - Y <= 60 and x> 60 And cmdback.width - x> 60 Ten cmdback.mousepointer = 7 elseif x <= 60 and y> 60 and cmdback.height - Y> 60 THEN Cmdback.mousepointer = 9 elseif cmdback.width - x <= 60 and y> 60 and cmdback.height - Y> 60 Then cmdback.mousepointer = 9 End IFEND SUB

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