VB6向VB.Net2005迁移相关知识

转自（http://blog.csdn.net/babyt/article/details/4610131）

问：

這是VB6.0在Module裡定義的, 
Declare Function rf_halt Lib "mwrf32.dll" (ByVal Icdev As Long) As IntegerDeclare Declare Function rf_authentication Lib "mwrf32.dll" (ByVal Icdev As Long, ByVal mode%, ByVal scenr%) As Integer 
.......................................... 
.......................................... 
.......................................... 
定義好多類似的，只是參數值不同,是這樣引用的:st=rf_halt(Icdev)), 
St = rf_authentication(Icdev, LoadMode, Sector),現在 
想改成VB.NET 2005，要怎樣改？急....謝謝....

答：

是要修改如何声明吗？ 

Declare Function rf_halt Lib "mwrf32.dll" (ByVal Icdev As Long) As Integer 
Declare Declare Function rf_authentication Lib "mwrf32.dll" (ByVal Icdev As Long, ByVal mode%, ByVal scenr%) As Integer 

改为： 
Declare Function rf_halt Lib "mwrf32.dll" (ByVal Icdev As Integer) As Int32 
Declare Declare Function rf_authentication Lib "mwrf32.dll" (ByVal Icdev As Integer, ByVal mode As Int16, ByVal scenr As Int16) As Int16 

---

问：
vb6代码： 
Private   Declare   Function   SMSDeliver_ReportCallBack   Lib   "third_gw "   (ByVal   Deliver_Report   As   Long)   As   Long 

Private   Sub   Command2_Click() 
        SMSDeliver_ReportCallBack   AddressOf   Deliver2 
End   Sub 

Public   Sub   Deliver2(ByRef   re_type   As   Long) 
...... 
End   Sub 

转换为。net后提示要用“委托”，怎么实现？

答：

Private   Declare   Function   SMSDeliver_ReportCallBack   Lib   "third_gw "   (   _ 
                                ByVal   lpfn   As   PROC)   As   Integer 
Public   Delegate   Function   PROC(ByRef   re_type   As   Integer)   As   Integer 
Public   gobjDelegate   As   PROC=New   PROC(AddressOf   Deliver2) 
Public   Sub   Deliver2(ByRef   re_type   As   Integer) 
...... 
End   Sub 
Private   Sub   Command2_Click() 
        SMSDeliver_ReportCallBack(gobjDelegate)   
End   Sub

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 问：
我现在有个图表的控件，要转换成.net的，这个图表控件大量用了line方法 
看msdn现在应该用drawline方法了，但是两个方法形式相差太多，我想自己写个 
line方法，但是Line [ [Step] (x1,y1)]－(x2,y2)[,颜色][,B[F]]的这种 
形式怎么变成相近的.net方法阿，像Line [Step] (x1,y1)]－(x2,y2)表示两个点 
这算什么语法现象阿，好像vb6写个函数也不能这样嘛 
  大家给点意见，谢谢 

答：
vb6 
Picture1.Line (x1,y1)-(x2, y2), &HFFFFFF 

.net 

            Dim PicDC As Graphics 
            PicDC = picturebox1.CreateGraphics 
            PicDC.DrawLine(New Pen(Color.Red), x1, y1, x2, y2)

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Imports System.Reflection.Assembly

Imports System.Diagnostics.FileVersionInfo
 
’App.Path

Application.StartupPath

’App.Title

GetExecutingAssembly.GetName.Name

’App.ExeName

GetExecutingAssembly.Location

’App.Major

GetVersionInfo(GetExecutingAssembly.Location).ProductMajorPart

’App.Minor

GetVersionInfo(GetExecutingAssembly.Location).ProductMinorPart

’App.Revision

GetVersionInfo(GetExecutingAssembly.Location).ProductBuildPart

’App.LegalCopyrights

GetVersionInfo(GetExecutingAssembly.Location).LegalCopyright

’App.LegalTrademarks

GetVersionInfo(GetExecutingAssembly.Location).LegalTrademarks

’App.CompanyName

GetVersionInfo(GetExecutingAssembly.Location).CompanyName
 

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相关资源：
http://msdn.microsoft.com/zh-cn/library/ywsayxak(VS.80).aspx

http://www.applevb.com/art/vbnet1.htm
http://www.accessbbs.cn/bbs/blog/?1979/action_spacelist_type_blog.html

http://www.google.cn/search?client=aff-cs-maxthon&forid=1&ie=utf-8&oe=UTF-8&hl=zh-CN&q=vb.net+app.title

本项目使用：

VB需安装sp6/原项目中删除DAO的引用，先全部更改为ADO

几个关键函数的转换

http://forums.microsoft.com/MSDN-CHT/ShowPost.aspx?PostID=3308070&SiteID=14

http://forums.microsoft.com/MSDN-CHT/ShowPost.aspx?PostID=3308070&SiteID=14

http://www.softwelt.com/Know/KnowDetail-5167860.html

 

将VB6中Line的两个端点转换为.Net中的Label的Top(X)/Left(Y)以及长度