IME mode convert

[thanhtien]

I'm wrinting a program that is Japanese on screen keyboard. When I use the ImmSetOpenStatus function to open IME for the focus windows as MS words... But it have been always failed. This is my code:

BOOL COnscreenKeyboardDlg::SetImeSwitchON() 
{
    m_fLog.initLogFile();
    HWND wnd = ::GetForegroundWindow();
    if(IsWindow(wnd))
    {
        if(!AttachThreadInput(GetWindowThreadProcessId(m_hWnd,NULL),GetWindowThreadProcessId(wnd,NULL),TRUE)){
            m_fLog.putToLogFile( __FILE__, __LINE__, "AttachThreadInput failed\n");
        }
        ::SetFocus(wnd);
        char cWindowsName[MAX_PATH];
        ::GetWindowText(wnd,cWindowsName,MAX_PATH);
        m_fLog.putToLogFile( __FILE__, __LINE__, cWindowsName);
        HIMC hIMC = ImmGetContext(wnd);
        if(!ImmGetOpenStatus(hIMC)){
            if(!ImmSetOpenStatus(hIMC, TRUE)){
                m_fLog.putToLogFile( __FILE__, __LINE__, "ImmSetOpenStatus failed\n");
            }else{
                m_fLog.putToLogFile( __FILE__, __LINE__, "ImmSetOpenStatus successed\n");
            }
        }    
        ImmReleaseContext( wnd, hIMC);
    }else{
        m_fLog.putToLogFile( __FILE__, __LINE__, "IsWindow(wnd) failed\n");
    }
    m_fLog.closeLogFile();
    return 0;
}
 

I dont know where is wrong. please help me.

[weaknessforcats]

You are not checking any return values to se if things are working.

Hev you stepped though this with your debugger?

[thanhtien]

Hi weaknessforcats,
Thank you for your answer.
Yes I have debugged step by step and put it to the log file. It always failed at the ImmSetOpenStatus function.

[weaknessforcats]

HIMC hIMC = ImmGetContext(wnd);

Does ImmGetContext return a non-null HIMC? You don't check.

[thanhtien]

Hi weaknessforcats,
Thank you for your show. really, HIMC hIMC = ImmGetContext(wnd); was return NULL. But wnd is not NULL. why it return NULL? Can you teach me to correct it?

[weaknessforcats]

Are you using a version of Windows that supports this feature?

[thanhtien]

yes, I'm using Windows XP japanese version. It is supporting IME.

[weaknessforcats]

If your HWND is valid and you still get a NULL HIMC then you have a question for Microsoft.

[thanhtien]

Hi weaknessforcats,
Thank you for your help. I have solved it.

[weaknessforcats]

I'm glad to here that. But I am curious as to what the problem was. Can you share your solution?

[thanhtien]

Hi weaknessforcats,
The problem was my application can not switch IME mode of another application. So that ImmGetContext(wnd) always return null.
My solution is create global keyboard hook and implement the IME API in it. That's all.