FIX: Out of Memory Error When Adding 35-50 Pen Controls

MORE INFORMATION

Here are two examples showing how to work around this bug:

Step-by-Step Example One

The following example demonstrates how to use multiple Picture Boxes and one HEdit Control with the DelayRecog = True. This will allow the user to input signatures into a field which will then remain as written, no recognition is performed.

1. Start a new project in Visual Basic. Form1 is created by default.
2. Add the following controls, and set the indicated properties:

      Control          Property     Value
      ----------------------------------------
      Picture Box      Name         PictureB
                       Index        0
                       AutoRedraw   True
   
      Picture Box      Name         PictureB
                       Index        1
                       AutoRedraw   True
   
      HEdit Control    Name         HEdit1
                       DelayRecog   True
                       Text         <blank>
   
      Command Button   Name         Command1
                       Caption      Clear
   						

3. Add the following code to the General Declarations section of Form1:

      'Enter each of the following Declare statements on one, single line:
      Declare Function GetDC Lib "USER" (ByVal hWnd As Integer) As Integer
      Declare Function BitBlt Lib "GDI" (ByVal hDestDC As Integer,
         ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer,
         ByVal nHeight As Integer, ByVal hSrsDC As Integer,
         ByVal xSrc As Integer, ByVal ySrc As Integer, ByVal dwRop) As Integer
   
         Const SRCCOPY &H00CC0020&  ' Will be used in the call to BitBlt
         Dim LastPos As Integer     ' Will be used to keep track of the
                                    ' last edited field.
         Dim InkArray(2) As String  ' This array will be used to store the
                                    ' InkDataString for each of the fields.
   						

4. Add the following code to the appropriate Control's event procedures:

      Sub Command1_Click ()
         HEdit1.InkDataString = ""     ' Clear the field.
      End Sub
   
      Sub Form_Load ()
         Call PictureB_Click(0)    ' Position the HEdit control over the
      End Sub                      ' first field.
   
      Sub Picture1_Click (index As Integer)
         ' Copy the image in the HEdit control to the Picture Box
         destDC = GetDC(HEdit.hWnd)
         ' Enter the following three lines as one, single line:
         dummy% = BitBlt(PictureB(LastPos).HDC, 0, 0,
            PictureB(LastPos).ScaleWidth-2, PictureB(LastPos).ScaleHeight-2,
            destDC, 1, 1)
         InkArray(LastPos) = HEdit1.InkDataString
         ' Save the Ink data for this field.  It will be reassigned
         ' to the HEdit control the next time that field is selected
         ' and the HEdit control is positioned on top of it.
         LastPos = index        ' Update LastPos to the current field.
         HEdit1.Visible = False ' This prevent a flicker when the
                                ' control is moved.
         HEdit1.Top = PictureB(index).Top     ' Move the HEdit Control on
         HEdit1.Left = PictureB(index).Left   ' top of the selected Picture
         HEdit1.Width = PictureB(index).Width ' box field.
         HEdit1.Height = PictureB(index).Height
         HEdit1.InkDataString = InkArray(index) ' Reset the Ink in the
                                                ' Hedit Control to that
                                                ' stored for this field.
         HEdit1.Visible = True
      End Sub
   						

Step-by-Step Example Two

The following example demonstrates how to use multiple Labels and one HEdit Control with DelayRecog = False. This works using a BEdit control as well. This allows the user to input hand-written characters into a field where those characters will then be recognized and converted into font characters.

1. Start a new project in Visual Basic. Form1 is created by default.
2. Add the following controls, and set the indicated properties:

      Control         Property      Value
      -----------------------------------------------------------
      Label           Name          LabelF
                      Index         0
                      Caption       <blank>
   
      Label           Name          LabelF
                      Index         1
                      Caption       <blank>
   
      HEdit Control   Name          HEdit1
                      DelayRecog    False
                      Text          <blank>
   						

3. Add the following code to the General Declarations section of Form1:

      Dim LastPos As Integer
   						

4. Add the following code to the appropriate event procedures:

      Sub Form_Load ()
         Call LabelF_Click (0)
      End Sub
   
      Sub LabelF_Click (index As Integer)
         LabelF(LastPos).Caption = HEdit.Text    ' Copy the contents of
                                                 ' the HEdit Control to  the
                                                 ' Label Control.
         LastPos = index         ' Update LastPos to the current field.
         HEdit1.Visible = False  ' This prevent a flicker when the
                                 ' control is moved.
         HEdit1.Top = LabelF(index).Top       ' Move the HEdit Control on
         HEdit1.Left = LabelF(index).Left     ' top of the selected Picture
         HEdit1.Width = LabelF(index).Width   ' Box field.
         HEdit1.Height = LabelF(index).Height
         HEdit1.Text = LabelF(index).Caption  ' Reset the Ink in the HEdit
                                              ' Control to that stored for
                                              ' this field.
         HEdit1.Visible = True
      End Sub