Can't display unicode on title bar in WIN32 - c++

Question

I have been trying to create a Window whose title bar could be in any language. But I am getting something like ▯*. I writing as escape characters as of now. I am attesting the entirity of the code.
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <string>
LRESULT CALLBACK WindowProc(HWND Window, UINT Message, WPARAM WParam, LPARAM LParam) {
switch(Message) {
case WM_KEYDOWN: {
switch(WParam) {
case 'O': {
DestroyWindow(Window);
} break;
}
} break;
case WM_DESTROY: {
PostQuitMessage(0);
} break;
default: {
return DefWindowProc(Window, Message, WParam, LParam);
}
}
return 0;
}
int WINAPI WinMain(HINSTANCE Instance, HINSTANCE PrevInstance, PSTR CmdLine, int CmdShow) {
WNDCLASSW WindowClass = {0};
const wchar_t* ClassName = L"MyWindowClass";
WindowClass.lpfnWndProc = WindowProc;
WindowClass.hInstance = Instance;
WindowClass.lpszClassName = ClassName;
WindowClass.hCursor = LoadCursor(NULL, IDC_CROSS);
MessageBoxW(0, L"\u0906\u092a", L"\u0906\u092a", 0);
if(!RegisterClassW(&WindowClass)) {
MessageBoxW(0, L"RegisterClass failed", 0, 0);
return GetLastError();
}
HWND Window = CreateWindowExW(0, ClassName, L"\u0906\u092a",
WS_OVERLAPPEDWINDOW|WS_VISIBLE,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
0, 0, Instance, 0);
if(!Window) {
MessageBoxW(0, L"CreateWindowEx failed", 0, 0);
return GetLastError();
}
int Running = 1;
while(Running) {
MSG Message;
while(GetMessageW(&Message, NULL, 0, 0)) {
if(Message.message == WM_QUIT) Running = 0;
TranslateMessage(&Message);
DispatchMessage(&Message);
}
}
return 0;
}
I was expecting the title bar to be something like 'आप'