WorkbookBase.Protect Method

Article
07/25/2011

Protects a workbook so that it cannot be modified.

Namespace: Microsoft.Office.Tools.Excel
Assembly: Microsoft.Office.Tools.Excel.v4.0.Utilities (in Microsoft.Office.Tools.Excel.v4.0.Utilities.dll)

Syntax

'Declaration
Public Sub Protect ( _
    password As Object, _
    structure As Object, _
    windows As Object _
)

public void Protect(
    Object password,
    Object structure,
    Object windows
)

Parameters

password
Type: System.Object
A case-sensitive password for the workbook. If this argument is omitted, you can unprotect the workbook without using a password. Otherwise, you must specify the password to unprotect the workbook.

structure
Type: System.Object
true to protect the structure of the workbook (the relative position of the sheets). The default value is false.

windows
Type: System.Object
true to protect the workbook windows. If this argument is omitted, the windows are not protected.

Remarks

Use strong passwords that combine uppercase and lowercase letters, numbers, and symbols. Weak passwords do not mix these elements. For example, "Y6dh!et5" is a strong password, but "House27" is a weak password. Use a strong password that you can remember so that you do not have to write it down.

Optional Parameters

For information on optional parameters, see Optional Parameters in Office Solutions.

Examples

The following code example uses the Protect method to protect the structure of the workbook and workbook windows, but without specifying password protection. The example then checks the values of the ProtectStructure and ProtectWindows properties to verify that this protection is set.

This example is for a document-level customization.

Private Sub ProtectWorkbook()
    Me.Protect(Structure:=True, Windows:=True)

    If Me.ProtectStructure Then
        MsgBox("You cannot add, delete or change the location " & _
            "of sheets in this workbook.")
    End If

    If Me.ProtectWindows Then
        MsgBox("You cannot arrange windows in this workbook.")
    End If
End Sub

private void ProtectWorkbook()
{
    this.Protect(missing, true, true);

    if (this.ProtectStructure)
    {
        MessageBox.Show("You cannot add, delete or change the location " +
            "of sheets in this workbook.");
    }

    if (this.ProtectWindows)
    {
        MessageBox.Show("You cannot arrange windows in this workbook.");
    }
}

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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