如何在C＃Form中使用CB_SELECTSTRING窗口API [英] How to use CB_SELECTSTRING windows API in C# Form

问题描述

我正面临着在c＃中使用Windows API控制ComboBox的问题。我想在OpenFileDialog中控制一个ComboBox。

通过使用FindWindow，我可以访问ComboBox。但是，我不知道如何使用SendMessage从ComboBox中进行选择。

请帮忙。谢谢。

  int  hwndOpen =  0 ; 
  IntPtr  hwndChildOpen =  IntPtr  .Zero; 
  string  sss =  @  C：\\ \\Users; 
 
 hwndChildOpen = AccessWindowClass.FindWindowEx（（ IntPtr ）hwndOpen， IntPtr  .Zero ，  DUIViewWndClassName， null ）; 
 
 hwndChildOpen = AccessWindowClass.FindWindowEx（（ IntPtr ）hwndChildOpen， IntPtr  .Zero ，  DirectUIHWND， null ）; 
 
 hwndChildOpen = AccessWindowClass.FindWindowEx（（ IntPtr ）hwndChildOpen， IntPtr  .Zero ，  FloatNotifySink， null ）; 
 
 hwndChildOpen = AccessWindowClass.FindWindowEx（（ IntPtr ）hwndChildOpen， IntPtr  .Zero ，  ComboBox， null ）; 
 
 SendMessage（hwndChildOpen，AccessWindowClass.CB_INSERTSTRING， 0 ，sss）; 

解决方案

您使用了错误的消息。 您想使用 CB_SETCURSEL [ ^ ]在组合框的下拉列表中选择一个字符串。



/ ravi

I'm facing the problem to control ComboBox using Windows API in c#. I want to control a ComboBox in the OpenFileDialog.
By using FindWindow, I had access to ComboBox. However, I don't know how to select from the ComboBox by using SendMessage.
Please help. Thank you.

int hwndOpen = 0;
IntPtr hwndChildOpen = IntPtr.Zero;
string sss = @"C:\Users";

hwndChildOpen = AccessWindowClass.FindWindowEx((IntPtr)hwndOpen, IntPtr.Zero, "DUIViewWndClassName", null);

hwndChildOpen = AccessWindowClass.FindWindowEx((IntPtr)hwndChildOpen, IntPtr.Zero, "DirectUIHWND", null);

hwndChildOpen = AccessWindowClass.FindWindowEx((IntPtr)hwndChildOpen, IntPtr.Zero, "FloatNotifySink", null);

hwndChildOpen = AccessWindowClass.FindWindowEx((IntPtr)hwndChildOpen, IntPtr.Zero, "ComboBox", null);

SendMessage(hwndChildOpen, AccessWindowClass.CB_INSERTSTRING, 0, sss);

解决方案

You're using the wrong message.  You want to use CB_SETCURSEL[^] to select a string in the combobox's drop down.

/ravi

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