如何捕获使用Win32 API（C / C ++）的组合框“回车键”？ [英] How to capture “Enter key” in combobox using WIN32 API (C/C++)?

问题描述

我要赶上事件，当用户preSS在组合框中输入。如何抓住你。例如：
我在组合框中键入阮海防囊。之后pressing回车键，就显示一条消息：阮海防囊。
感谢你的帮助，

I want catch event when user press Enter in combobox. How to catch you. For Example: I type " Nguyen Phong Sac" in my combobox. After pressing Enter key, there is a message is displayed: " Nguyen Phong Sac". Thanks yours helps,

推荐答案

我还是想知道你在写什么样的节目，但我会给你一个例子，你问：

I still want to know what kind of program are you writing, but I will give you an example as you asked:

//Tested with Windows 7 x64, VS2012
//When Creating:
hWndComboBox = CreateWindow(WC_COMBOBOX, TEXT(""), 
               CBS_DROPDOWN | CBS_HASSTRINGS | WS_CHILD | WS_OVERLAPPED | WS_VISIBLE,
               xpos, ypos, nwidth, nheight, hwndParent, NULL, HINST_THISCOMPONENT,
               NULL);

hWndEditBox = CreateWindow(WC_EDIT, TEXT(""), 
              CBS_DROPDOWN | CBS_HASSTRINGS | WS_CHILD | WS_OVERLAPPED | WS_VISIBLE,
              xpos, ypos-30, nwidth, 30, hwndParent, NULL, HINST_THISCOMPONENT,
              NULL);

//Get hwnd of edit control in combobox created earlier.
HWND hwndEdit = GetWindow(hWndComboBox, GW_CHILD);
//Use SetWindowLong to create subclass, lpfnEditWndProc is original proc
lpfnEditWndProc = (WNDPROC) SetWindowLong(hwndEdit, GWL_WNDPROC, (DWORD) SubClassProc); 


//In Subclass Proc
LRESULT CALLBACK SubClassProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) 
{ 
   switch (msg) 
   { 
    case WM_KEYDOWN: 
        switch (wParam) 
        {  
            case VK_RETURN: 
                                    //Get Text&Set Text
                LPTSTR buffer = new TCHAR[255];
                GetWindowText(hwnd, buffer, 255);
                SetWindowText(hWndEditBox, buffer);
            break;
        } 
        break; 

  } 

  return CallWindowProc(lpfnEditWndProc, hwnd, msg, wParam, lParam); 
} 

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