C + + methods for obtaining information in other program form controls _c language

The example in this article describes how C + + obtains information in other program form controls. Share to everyone for your reference. The specific analysis is as follows:

This shows a way to get information about other program form controls,

Use the FindWindow API to find the text box handle and get the text with SendMessage (Wm_gettext)

#include <windows.h> 
BOOL CALLBACK enumchildproc (HWND hwnd,lparam LPARAM); 
int WINAPI WinMain (hinstance hinstance,hinstance hprevinstance,lpstr lpcmdline,int ncmdshow) 
{ 
  char className []= "Notepad"; 
  HWND Hwnd=::findwindow (classname,null);   
    if (hWnd) 
  { 
    :: Enumchildwindows (hwnd,enumchildproc,0); 
    return 0; 
  } 
  MessageBox (NULL, "fail!", "fail", MB_OK); 
  return 0; 
} 
BOOL CALLBACK Enumchildproc (HWND hwnd,lparam LPARAM) 
{ 
  char temp1[256],temp2[256];: 
  : GetClassName ( hwnd,temp1,255); 
  if (!::strcmp (Temp1, "Edit")) 
  { 
    :: SendMessage (hwnd,wm_gettext,sizeof (TEMP2)/sizeof (char), (LPARAM) Temp2 );
    Edit handle, message, receive buffer size, receive buffer pointer 
    :: MessageBox (NULL,TEMP2, "get", MB_OK);  
    return 0; 
  } 
  :: wsprintf (Temp2, "ClassName:%s", TEMP1); 
  MessageBox (NULL,TEMP2, "CWnd", MB_OK); 
  return true; 
}

I hope this article will help you with the C + + program design.