How do i detect the control that sent the WM_KEYDOWN? - winapi

Question

WM_KEYDOWN message sends the message to the main window, I'd like to get control that originated the message. I've tried with GetFocus() handling WM_KEYDOWN like below but it didn't do anything, even when a press a key with focus on the buttona. How is that done? what am I missing?
Here's how I'm handling WM_KEYDOWN:
case WM_KEYDOWN:
HWND hFocus = GetFocus();
if(hFocus == buttonA)
{
buttona_onKeyDown();
}
else if(hFocus == buttonB)
{
buttonb_onKeyDown();
}
else
{
//MessageBox(NULL, L"Not found!", L"", MB_OK);
}
break;
full code:
#pragma comment(lib, "user32.lib")
#pragma comment(lib, "Comctl32.lib")
#pragma comment(lib, "Gdi32.lib")
#define WIN32_LEAN_AND_MEAN
#define UNICODE
#define _UNICODE
#include <windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void buttona_onKeyDown();
void buttonb_onKeyDown();
HWND buttonA, buttonB;
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PWSTR lpCmdLine, int nCmdShow) {
MSG msg;
WNDCLASSW wc = {0};
wc.lpszClassName = L"Buttons";
wc.hInstance = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(0, IDC_ARROW);
RegisterClassW(&wc);
HWND hWnd =
CreateWindowW(wc.lpszClassName, L"Buttons",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
150, 150, 300, 200, 0, 0, hInstance, 0);
while (GetMessage(&msg, NULL, 0, 0))
{
if (!IsDialogMessage(hWnd, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam) {
switch(msg)
{
case WM_CREATE:
buttonA =
CreateWindowW(L"Button", L"A",
WS_VISIBLE | WS_CHILD | WS_TABSTOP,
20, 50, 80, 25, hwnd, (HMENU) 10, NULL, NULL);
buttonB =
CreateWindowW(L"Button", L"B",
WS_VISIBLE | WS_CHILD | WS_TABSTOP,
120, 50, 80, 25, hwnd, (HMENU) 11, NULL, NULL);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_KEYDOWN:
HWND hFocus = GetFocus();
if(hFocus == buttonA)
{
buttona_onKeyDown();
}
else if(hFocus == buttonB)
{
buttonb_onKeyDown();
}
else
{
//MessageBox(NULL, L"Not found!", L"", MB_OK);
}
break;
}
return DefWindowProcW(hwnd, msg, wParam, lParam);
}
void buttona_onKeyDown()
{
MessageBox(NULL, L"A OnKeyDown", L"", MB_OK);
}
void buttonb_onKeyDown()
{
MessageBox(NULL, L"B OnKeyDown", L"", MB_OK);
}