Windows virtual key codes

Question

How can I implement a function like std::string VirtualKeyCodeToStdString(UCHAR key) which returns virtual keys descriptions?

Example: input is VK_CAPITAL, return value is std::string("Caps Lock")

Answer 1

There is no full answer. Thank you everybody for helping. After more research I wrote complete function that converts virtualKey to std::string description.

* std::basic_string < TCHAR > Version: *

typedef std::basic_string<TCHAR> tstring;

tstring VirtualKeyCodeToString(UCHAR virtualKey)
{
    UINT scanCode = MapVirtualKey(virtualKey, MAPVK_VK_TO_VSC);

    TCHAR szName[128];
    int result = 0;
    switch (virtualKey)
    {
        case VK_LEFT: case VK_UP: case VK_RIGHT: case VK_DOWN:
        case VK_RCONTROL: case VK_RMENU:
        case VK_LWIN: case VK_RWIN: case VK_APPS:
        case VK_PRIOR: case VK_NEXT:
        case VK_END: case VK_HOME:
        case VK_INSERT: case VK_DELETE:
        case VK_DIVIDE:
        case VK_NUMLOCK:
            scanCode |= KF_EXTENDED;
        default:
            result = GetKeyNameText(scanCode << 16, szName, 128);
    }
    if(result == 0)
        throw std::system_error(std::error_code(GetLastError(), std::system_category()),
                                "WinAPI Error occured.");
    return szName;
}

std::string version:

std::string VirtualKeyCodeToString(UCHAR virtualKey)
{
    UINT scanCode = MapVirtualKey(virtualKey, MAPVK_VK_TO_VSC);

    CHAR szName[128];
    int result = 0;
    switch (virtualKey)
    {
        case VK_LEFT: case VK_UP: case VK_RIGHT: case VK_DOWN:
        case VK_RCONTROL: case VK_RMENU:
        case VK_LWIN: case VK_RWIN: case VK_APPS:
        case VK_PRIOR: case VK_NEXT:
        case VK_END: case VK_HOME:
        case VK_INSERT: case VK_DELETE:
        case VK_DIVIDE:
        case VK_NUMLOCK:
            scanCode |= KF_EXTENDED;
        default:
            result = GetKeyNameTextA(scanCode << 16, szName, 128);
    }
    if(result == 0)
        throw std::system_error(std::error_code(GetLastError(), std::system_category()),
                                "WinAPI Error occured.");
    return szName;
}