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segatools-hay1tsme/idzio/wnd.c

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#include <windows.h>
#include <assert.h>
#include <string.h>
#include "util/dprintf.h"
/* DirectInput requires a window for correct initialization (and also force
feedback), so this source file provides some utilities for creating a
generic message-only window. */
static LRESULT WINAPI idz_io_wnd_proc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam);
HRESULT idz_io_wnd_create(HINSTANCE inst, HWND *out)
{
HRESULT hr;
WNDCLASSEXW wcx;
ATOM atom;
HWND hwnd;
assert(inst != NULL); /* We are not an EXE */
assert(out != NULL);
*out = NULL;
memset(&wcx, 0, sizeof(wcx));
wcx.cbSize = sizeof(wcx);
wcx.lpfnWndProc = idz_io_wnd_proc;
wcx.hInstance = inst;
wcx.lpszClassName = L"IDZIO";
atom = RegisterClassExW(&wcx);
if (atom == 0) {
hr = HRESULT_FROM_WIN32(GetLastError());
dprintf("IDZIO: RegisterClassExW failed: %08x\n", (int) hr);
goto fail;
}
hwnd = CreateWindowExW(
0,
(wchar_t *) (intptr_t) atom,
L"",
0,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
HWND_MESSAGE,
NULL,
inst,
NULL);
if (hwnd == NULL) {
hr = HRESULT_FROM_WIN32(GetLastError());
dprintf("IDZIO: CreateWindowExW failed: %08x\n", (int) hr);
goto fail;
}
*out = hwnd;
return S_OK;
fail:
UnregisterClassW((wchar_t *) (intptr_t) atom, inst);
return hr;
}
static LRESULT WINAPI idz_io_wnd_proc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
switch (msg) {
default:
return DefWindowProcW(hwnd, msg, wparam, lparam);
}
}