use of com.sun.jna.platform.win32.WinUser.WNDCLASSEX in project jna by java-native-access.
the class User32WindowMessagesTest method createWindowAndLoop.
public void createWindowAndLoop(String windowClass) {
// define new window class
HMODULE hInst = Kernel32.INSTANCE.GetModuleHandle("");
WNDCLASSEX wClass = new WNDCLASSEX();
wClass.hInstance = hInst;
wClass.lpfnWndProc = new WindowProc() {
@Override
public LRESULT callback(HWND hwnd, int uMsg, WPARAM wParam, LPARAM lParam) {
// log(hwnd + " - received a message : " + uMsg);
switch(uMsg) {
case WinUser.WM_CREATE:
{
log(hwnd + " - onCreate: WM_CREATE");
return new LRESULT(0);
}
case WinUser.WM_CLOSE:
log(hwnd + " WM_CLOSE");
User32.INSTANCE.DestroyWindow(hwnd);
return new LRESULT(0);
case WinUser.WM_DESTROY:
{
log(hwnd + " - on Destroy.");
User32.INSTANCE.PostQuitMessage(0);
return new LRESULT(0);
}
case WinUser.WM_USER:
{
log(hwnd + " - received a WM_USER message with code : '" + wParam + "' and value : '" + lParam + "'");
if (wParam.intValue() == MSG_SIMPLE_CODE) {
assertEqualsForCallbackExecution(MSG_SIMPLE_VAL, lParam.intValue());
}
if (wParam.intValue() == MSG_HOOKED_CODE) {
assertEqualsForCallbackExecution(MSG_HOOKED_VAL, lParam.intValue());
}
return new LRESULT(0);
}
case WinUser.WM_COPYDATA:
{
COPYDATASTRUCT copyDataStruct = new COPYDATASTRUCT(new Pointer(lParam.longValue()));
ULONG_PTR uMsg1 = copyDataStruct.dwData;
Pointer lParam1 = copyDataStruct.lpData;
int wParam1 = copyDataStruct.cbData;
log(hwnd + " - received a WM_COPYDATA message with code : '" + uMsg1 + "' of size : '" + wParam1 + "'");
switch(uMsg1.intValue()) {
case DATA_STRUCT_CODE:
{
MsgStruct msg = new MsgStruct(lParam1);
// log(hwnd + " - received structured content : " + msg.toString(true));
log(hwnd + " - message is of type MsgStruct with number = " + msg.number + " and message = '" + msg.message + "'");
assertEqualsForCallbackExecution(MSG_STRUCT_NUMBER, msg.number);
assertEqualsForCallbackExecution(MSG_STRUCT_VAL, msg.message);
}
}
return new LRESULT(0);
}
default:
return User32.INSTANCE.DefWindowProc(hwnd, uMsg, wParam, lParam);
}
}
};
wClass.lpszClassName = windowClass;
// register window class
User32.INSTANCE.RegisterClassEx(wClass);
getLastError();
// create new window
HWND hWnd = User32.INSTANCE.CreateWindowEx(User32.WS_EX_TOPMOST, windowClass, "My hidden helper window, used only to catch the windows events", 0, 0, 0, 0, 0, null, null, hInst, null);
getLastError();
log("window sucessfully created! window hwnd: " + hWnd.getPointer().toString());
MSG msg = new MSG();
while (User32.INSTANCE.GetMessage(msg, hWnd, 0, 0) > 0) {
User32.INSTANCE.TranslateMessage(msg);
User32.INSTANCE.DispatchMessage(msg);
}
User32.INSTANCE.UnregisterClass(windowClass, hInst);
User32.INSTANCE.DestroyWindow(hWnd);
log("program exit!");
}
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