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AutoCAD 2018 开发者帮助

HistoryLines 属性（ActiveX）

2024-5-18 16:54| 发布者: admin| 查看: 339| 评论: 0|原作者: admin|来自: AutoCAD

指定文本窗口中要保留在内存中的文本行数。

支持的平台：仅限 Windows

签名

VBA：

object.HistoryLines

对象

类型：首选项显示

此属性应用于的对象。

属性值

只读：不

类型：整数

初始值为 400。

言论

没有其他评论。

例子

VBA：

Sub Example_HistoryLines()
    ' This example returns the current setting of
    ' HistoryLines. It then changes the value, and finally
    ' it resets the value back to the original setting.
    
    Dim preferences As AcadPreferences
    Dim currHistoryLines As Integer
    
    Set preferences = ThisDrawing.Application.preferences
    
    ' Retrieve the current HistoryLines value
    currHistoryLines = preferences.DISPLAY.HistoryLines
    MsgBox "The current value for HistoryLines is " & preferences.DISPLAY.HistoryLines, vbInformation, "HistoryLines Example"
    
    ' Change the value for HistoryLines
    preferences.DISPLAY.HistoryLines = 42
    MsgBox "The new value for HistoryLines is " & preferences.DISPLAY.HistoryLines, vbInformation, "HistoryLines Example"
    
    ' Reset HistoryLines to its original value
    preferences.DISPLAY.HistoryLines = currHistoryLines
    MsgBox "The HistoryLines value is reset to " & preferences.DISPLAY.HistoryLines, vbInformation, "HistoryLines Example"
End Sub

可视化 LISP：

(vl-load-com)
(defun c:Example_HistoryLines()
    ;; This example returns the current setting of
    ;; HistoryLines. It then changes the value, and finally
    ;; it resets the value back to the original setting.
    (setq acadObj (vlax-get-acad-object))
    (setq preferences (vla-get-Preferences acadObj))
    
    ;; Retrieve the current HistoryLines value
    (setq currHistoryLines (vla-get-HistoryLines (vla-get-Display preferences)))
    (alert (strcat "The current value for HistoryLines is " (itoa currHistoryLines)))
    
    ;; Change the value for HistoryLines
    (vla-put-HistoryLines (vla-get-Display preferences) 42)
    (alert (strcat "The new value for HistoryLines is " (itoa (vla-get-HistoryLines (vla-get-Display preferences)))))
    
    ;; Reset HistoryLines to its original value
    (vla-put-HistoryLines (vla-get-Display preferences) currHistoryLines)
    (alert (strcat "The HistoryLines value is reset to " (itoa (vla-get-HistoryLines (vla-get-Display preferences)))))
)