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Ok, so why this code wont work?

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#include <iostream>
#include <Windows.h>

using namespace std;

int main()
HWND hwnd = FindWindow("Notepad", NULL);
cout << hwnd << endl;

SendMessage(hwnd, WM_KEYDOWN,0x43, 0); // C Key
SendMessage(hwnd, WM_KEYUP, 0x43, 0);

return 0;

Tried with VS 2010 and Codeblocks

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Keys werent sent to notepad edit field

Ok i know why it wont work

HWND hwnd = FindWindow("Notepad", NULL);

Isnt a "place" to send keys, you must set it with more precision like

HWND general_hwnd = FindWindow("Notepad", NULL);
HWND edit_hwnd = FindWindowEx(general_hwnd, NULL, "Edit", NULL);

Then it will work

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