用微软接口调系统的虚拟键盘

这里的QProcess是Qt的进程类，如果用别的平台可以另做处理

#include <QProcess>



#ifdef Q_OS_WIN32
#include "Windows.h"
#include <ShellAPI.h>

#endif



void windowsTabTip()
{
    bool ret = false;
    OSVERSIONINFO osvi;
    ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    GetVersionEx(&osvi);
    char* windir = getenv("windir");
    char winroot = 'c';
    if (!windir || strcmp(windir, "")) {
        winroot = windir[0];
    }
    char tabtip[260];
    char tabtipworksp[260];
    if (osvi.dwMajorVersion <= 5) {// XP
        sprintf(tabtip, "%c:\\Windows\\System32\\osk.exe ", winroot);
        sprintf(tabtipworksp, "%c:\\Windows\\System32", winroot);
        ret = QProcess::startDetached(tabtip, QStringList(), tabtipworksp);
    } else if (osvi.dwMajorVersion >= 6) {
        if (osvi.dwMinorVersion >= 2) { // win8, win8.1, Windows Server 2012
            PVOID OldValue;
            BOOL bRet = Wow64DisableWow64FsRedirection(&OldValue);
            ShellExecuteA(NULL, "open", "osk.exe", 0, 0, SW_SHOW);
            if (bRet) {
                Wow64RevertWow64FsRedirection(OldValue);
            }
            return ;
        }
        // vista win7
        sprintf(tabtip, "%c:\\Program Files\\Common Files\\Microsoft Shared\\ink\\TabTip.exe ", winroot);
        sprintf(tabtipworksp, "%c:\\Program Files\\Common Files\\Microsoft Shared\\ink", winroot);
        ret = QProcess::startDetached(tabtip, QStringList(), tabtipworksp);
        if (!ret) {
            sprintf(tabtip, "%c:\\Program Files (x86)\\Common Files\\Microsoft Shared\\ink\\TabTip32.exe ", winroot);
            sprintf(tabtipworksp, "%c:\\Program Files (x86)\\Common Files\\Microsoft Shared\\ink", winroot);
            ret = QProcess::startDetached(tabtip, QStringList(), tabtipworksp);
            if (!ret) {
                HWND hTabTip = ::FindWindowA("IPTip_Main_Window", 0);
                if (hTabTip) {
                    ShowWindow(hTabTip, SW_NORMAL);
                    DWORD WM_DESKBAND_CLICKED = ::RegisterWindowMessage(L"TabletInputPanelDeskBandClicked");
                    ::PostMessage(hTabTip, WM_DESKBAND_CLICKED, 0, 0);
                } else {
                    sprintf(tabtip, "%c:\\Windows\\System32\\osk.exe ", winroot);
                    sprintf(tabtipworksp, "%c:\\Windows\\System32", winroot);
                    ret = QProcess::startDetached(tabtip, QStringList(), tabtipworksp);
                }
            }
        }
    }
}