Thread: Finding correct window handle

Hello,

I am trying to work out the correct way to print out a list of child windows (and child of child windows etc). So far I have done a few tests on the Windows Notepad program by using:

Code:

#include <windows.h>
.....
hwnd1 = FindWindow(NULL, "Untitled - Notepad");
hwnd2 = GetWindow(hwnd1, GW_CHILD);

which gets the main text box window.

Could someone help me work out how to do a similar thing for more complex programs which have multiple child windows or sub-child windows.

Thanks,
Chris

Yes, the EnumWindows function is tailor made for that task.

You pass a callback function to it, in which you can simply call EnumChildWindows on all the window handles you get.


Here's something I was playing with a long time ago, I'll just post it as is, so it might have a few errors, but it still demonstrates its use. The purpose of it was to find a notepad window and type the message in it using SendMessage.

Code:

#include <windows.h>
#include <stdio.h>

char message[] = "\n\nI can see you.\n\nI herd u like mudkipz.\n\n .. Is dat right?\n";

BOOL CALLBACK EnumChildProc(HWND hWnd, LPARAM lParam)
{
     char buffer[100] = {0};
     unsigned int i = 0;
     
     if(!hWnd)  return TRUE; 
     
     if(GetClassName(hWnd, buffer, 100) == 0) return TRUE;
     
     printf(" - %s\n", buffer);
     
     /*for(i = 0; i < strlen(message); i++)
     {
           SendMessage(hWnd, WM_CHAR, message[i], 0);
           
           sleep(200);
     }*/
     

     
     memset(buffer, 0, 100);
}


BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam)
{
     char buffer[100] = {0};
     int i = 0;
     if(!hWnd) return TRUE;
     
     
     if(GetWindowText(hWnd, buffer, 100) == 0) return TRUE;
     
     
     
     printf("Child windows for '%s':\n", buffer);
     //SetForegroundWindow(hWnd);               
     EnumChildWindows(hWnd, EnumChildProc, 0);
     
     
               
     
     

     memset(buffer, 0, 100);
}


int main(void)
{
    
     //ShellExecute(NULL, "open", "notepad.exe", NULL, "C:\\Windows", SW_SHOW);
     
     sleep(500);
     EnumWindows(EnumWindowsProc, 0);
    
    
    
}