CAD VBA二次开发经典例子

AutoCAD DwgThumbnail Control Version 1.8 DwgThumbnail is provided "AS IS" without any expressed or implied warranty. You are free to use, reverse engineer, modify and redistibute it. CONTENTS: * Introduction * How to install * Notes * Revision History Introduction ============ DwgThumbnail is an OCX that you can use to display the bitmap thumbnail saved in the AutoCAD R13/R14 drawing file. How to install DwgThumbnail =========================== The zip file you received should contain the following files: ReadMe.txt DwgThumbnail.ocx DwgThumbnail.hlp Steps to install DwgThumbnail 1. Copy the files into a folder 2. Run Regsvc32 with DwgThumbnail.ocx as an argument for example: regsvr32 c:\<YOURINSTALLDIRECTORY>\dwgthumbnail.ocx You can use other registration methods. Please refer to the documentation that comes with your development environment. Notes ===== -DwgThumbnail includes no UNICODE support as of this release. -Since some APIs used by DwgThumbnail are buggy (see KB article Q138105) on Window 95 DwgThumbnail may display ugly thumbnails in case the control is smaller than the actual bitmap. This does not affect NT40 users as the bug has been fixed there. Revision History ================ 1.0 -Initial Implementation 1.1 -Removed bug leaking memory -Fixed bug on Style property page causing the wrong blting mode to be set 1.2 -Added support for windowless creation -Added support for persistence of BitmapBackColor, StretchBltMode and NoMagnify properties -DwgThumbnail now shows a "focus rectangle" when it has the focus 1.3 -Fixed a memory leak introduced by version 1.2 -Added support for the Picture property -Help string added to be displayed by object browsers -Help context added to methods, properties events to enable controllers to display context sensitive help 1.4 -Added HasFocusRect property -DwgThumbnail now opens files in sharDenyNone mode making it possible to view drawing thumbnails for files that are already open in AutoCAD -Fixed problems exprienced when using the the control with fm20.dll (the form engine currently used by VBA) -Made the properties better integrated in VB(A) property pane. (All properties are bindable.) 1.5 -Added explicit check for file version. (Some pre-13 dwgs caused dwgthumbnail to hang.) 1.6 -Added the DwgFileName property to persistent data of the control. (This lets HTML authors to use "<PARAM NAME .." syntax for this property.) -Updated the help file to include information about what properties are persistent. 1.7 -Fixed Picture property: background color now reflects one set by the control not the original in the dwg file. 1.8 -Changed to static linking of MFC and the CRT. It makes the ocx bigger but it is still small enough and much easier to support.