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如何自动关闭模式窗体

[英]How to automatically close a modal form

我有一个VB6项目,并且实现了带有自动注销功能的会话计时器。

我的问题是是否打开了模式窗体,但此窗体不在Forms Collection中,所以我不知道是否为打开窗体而将其卸载。 使用非模式形式,没有问题。

如果有人有主意? 是否可以显示所有打开的表单(非模式和模式)?

感谢您的回复

编辑:代码段:

表格创建:

Dim FormLoc As New F_Options
FormLoc.Show vbModal

破坏形式:

For Each mFrm In Forms
    unload mFrm
next    

For Each mFrm In F_MDIParent.MDIActiveX1.Forms
    unload mFrm
next 

主要形式是MDI形式。 其他表格可以在MDI Mainform中打开和停靠,但有些表格是“正常”的。

编辑:

我进行了一些测试,并且Forms集合依赖于一个项目,我认为该集合对于应用程序是全局的,但显然不是。

我想关闭主项目中的所有表格。 我可以通过另一个项目打开一个模式表单(所有应用程序都包含90个项目)

如果您只想确保已关闭,也可以使用Windows API函数:

专用声明函数CloseWindow Lib“ user32”别名“ CloseWindow”(ByVal hwnd as Long)长

如果wid <> 0,则将wid设为长wid = FindWindow(vbnullstring,“”),然后关闭Window wid

一种可行的替代方法;

do until Screen.ActiveForm is Nothing
    unload Screen.ActiveForm
loop

模态,无模态和默认表单的确显示在表单集合中

运行以下测试项目以查看其发生情况:

'project with 2 forms
'  form1 with :
'    1 label: name=Label1
'    1 timer: name=Timer1
'    4 command buttons: names are Command1, Command2, Command3, Command4
'  form2 with nothing on it
Option Explicit

Private Sub Command1_Click()
  Dim frm As New Form2
  frm.BackColor = vbRed
  frm.Show vbModal
End Sub

Private Sub Command2_Click()
  Dim frm As New Form2
  frm.BackColor = vbGreen
  frm.Show vbModeless, Me
End Sub

Private Sub Command3_Click()
  Dim frm As New Form2
  frm.Show
End Sub

Private Sub Form_Load()
  With Screen
    Move .Width / 2, 0, .Width / 2, .Height / 2
  End With 'Screen
  Command1.Caption = "modal"
  Command2.Caption = "modeless"
  Command3.Caption = "default"
  Command4.Caption = "unload"
  With Timer1
    .Interval = 1000
    .Enabled = True
  End With 'Timer1
End Sub

Private Sub Form_Resize()
  Dim sngLblWidth As Single, sngLblHeight As Single
  Dim sngCmdWidth As Single, sngCmdHeight As Single
  sngCmdHeight = 495
  sngLblHeight = ScaleHeight - sngCmdHeight
  sngLblWidth = ScaleWidth
  sngCmdWidth = sngLblWidth / 4
  Label1.Move 0, 0, sngLblWidth, sngLblHeight
  Command1.Move 0, sngLblHeight, sngCmdWidth, sngCmdHeight
  Command2.Move sngCmdWidth, sngLblHeight, sngCmdWidth, sngCmdHeight
  Command3.Move 2 * sngCmdWidth, sngLblHeight, sngCmdWidth, sngCmdHeight
  Command4.Move 3 * sngCmdWidth, sngLblHeight, sngCmdWidth, sngCmdHeight
End Sub

Private Sub Timer1_Timer()
  Dim frm As Form
  Dim strShow As String
  strShow = CStr(Now)
  For Each frm In Forms
    strShow = strShow & vbCrLf & frm.Name
  Next frm
  Label1.Caption = strShow
End Sub

[编辑]

向form2添加3个命令按钮,然后单击它们以测试卸载时发生的情况

从ide上运行时进行测试,并注意显示模态表单时,显示无模式表单时(带有所有者)和显示默认表单时(不带所有者)的区别..请注意“运行”按钮我的想法..当卸载带有模型表格的form1时,应用程序仍在运行

这是Form2的代码

Option Explicit

Private Sub Command1_Click()
  UnloadForms "Form1"
End Sub

Private Sub Command2_Click()
  UnloadForms "Form2"
End Sub

Private Sub Command3_Click()
  UnloadForms ""
End Sub

Private Sub Form_Load()
  Command1.Caption = "Unload Form1"
  Command2.Caption = "Unload Form2"
  Command3.Caption = "Unload All"
End Sub

Private Sub UnloadForms(strName As String)
  Dim frm As Form
  For Each frm In Forms
    If InStr(frm.Name, strName) > 0 Then
      Unload frm
    End If
  Next frm
End Sub

[编辑2]

下面是我用来卸载所有表格的子程序,该子程序位于模块中,因此我可以在任何地方调用它

Public Sub UnloadAll(strExcept As String, blnKeepMDI As Boolean)
  Dim frm As Form
  'unload all other forms
  For Each frm In Forms
    Select Case frm.Name
      Case "mdiPaneel"   'unload mdi as last
      Case "frmMsg"      'dont unload msg unless specified
      Case strExcept     'dont unload this if mdi stays
        If blnKeepMDI = False Then
          Unload frm
        End If
      Case Else
        Unload frm
    End Select
  Next frm
  If blnKeepMDI = False Then
    'unload mdi and finish program
    Unload mdiPaneel
  End If
End Sub

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