Low level keyboard hook on windows ce

Locutus

Hi all,

I have tried and looked everywhere however, I cannot seem to find a way to low level keyboard hook under windows ce. All the examples I have found use SetWindowsHookEx which is apparently unsupported under windows ce. The examples for windows ce I have found use loadlibrary to load coredll.dll and call the SetWindowsHookEx function that way.

As far as I know there is QLibrary which can perform the same function unfortunately I am unable to wrap my head around combining these concepts.

Does anyone know of a way to low level keyboard hook on windows ce and show me how I can do it? Example code would be fantastic or even an RTFM this old head of mine can understand.

Thanks for your time.

Locutus

I have been doing some research on this and this is what I have managed to come up with.

In the header I have put
@
#include <QtGui/QMainWindow>
#include <QLibrary>

typedef struct tagKBDLLHOOKSTRUCT {
DWORD vkCode;
DWORD scanCode;
DWORD flags;
DWORD time;
ULONG_PTR dwExtraInfo;
} KBDLLHOOKSTRUCT, *PKBDLLHOOKSTRUCT, *LPKBDLLHOOKSTRUCT;

class testClass : public QMainWindow
{
Q_OBJECT
private:
friend LRESULT CALLBACK LowLevelKeyboardProc(int code, WPARAM wparam, LPARAM lparam);
}@

in the implementation file I have.

@
#include "testClass.h"

LRESULT CALLBACK LowLevelKeyboardProc(int code, WPARAM wparam, LPARAM lparam)
{
int HC_ACTION = 0;

typedef int (cNextHookEx)(int, int, WPARAM, LPARAM);
cNextHookEx CallNextHookEx = (cNextHookEx) QLibrary::resolve("coredll","CallNextHookEx");
KBDLLHOOKSTRUCT kllhs = reinterpret_cast<KBDLLHOOKSTRUCT*>(lparam);
if (code == HC_ACTION)
{
if (wparam == WM_KEYDOWN && (kllhs->vkCode == VK_F3 || kllhs->vkCode == VK_F4) &&
(GetAsyncKeyState(VK_MENU) < 0 && GetAsyncKeyState(VK_CONTROL) < 0))
{
mobiMeter* w = dynamic_cast<mobiMeter*>(qApp->activeWindow());
if (NULL != w)
{
qDebug() << " this should not be blocking!";
return 1;
}
}
}

return CallNextHookEx(0, code, wparam, lparam);

}

testClass::testClass(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
int WH_KEYBOARD_LL = 20;
ui.setupUi(this);
typedef int (*sWindowHookEx)(int, int, int, int);
sWindowHookEx SetWindowsHookEx = (sWindowHookEx) QLibrary::resolve("coredll","SetWindowsHookEx");
SetWindowsHookEx(WH_KEYBOARD_LL,
(int)LowLevelKeyboardProc,
NULL,
0);

}@

It compiles fine yet when I try to run it, it crashes. Now I don't know what to do :( Any ideas?