The wrapper around it *is* doing translation! Here is the table from guitest.xs: 
/*  Find the virtual keycode (Windows VK_* constants) given a 
 *  symbolic name.
 */
int findvkey(const char* name, int* key) 
--snip--
        "BAC", VK_BACK,
        "BS" , VK_BACK,
        "BKS", VK_BACK,
        "BRE", VK_CANCEL,
        "CAP", VK_CAPITAL,
        "DEL", VK_DELETE,
        "DOW", VK_DOWN,
        "END", VK_END,
        "ENT", VK_RETURN,
        "ESC", VK_ESCAPE,
        "HEL", VK_HELP,
        "HOM", VK_HOME,
        "INS", VK_INSERT,
        "LEF", VK_LEFT,
        "NUM", VK_NUMLOCK,
        "PGD", VK_NEXT,
        "PGU", VK_PRIOR,
        "PRT", VK_SNAPSHOT,
        "RIG", VK_RIGHT,
        "SCR", VK_SCROLL,
        "TAB", VK_TAB,
        "UP",  VK_UP,
        "F1",  VK_F1,
        "F2",  VK_F2,
        "F3",  VK_F3,
        "F4",  VK_F4,
        "F5",  VK_F5,
        "F6",  VK_F6,
        "F7",  VK_F7,
        "F8",  VK_F8,
        "F9",  VK_F9,
        "F10",  VK_F10,
        "F11",  VK_F11,
        "F12",  VK_F12,
        "F13",  VK_F13,
        "F14",  VK_F14,
        "F15",  VK_F15,
        "F16",  VK_F16,
        "F17",  VK_F17,
        "F18",  VK_F18,
        "F19",  VK_F19,
        "F20",  VK_F20,
        "F21",  VK_F21,
        "F22",  VK_F22,
        "F23",  VK_F23,
        "F24",  VK_F24,
        "SPC",  VK_SPACE,
        "SPA",  VK_SPACE,
        "LWI",  VK_LWIN,
        "RWI",  VK_RWIN,
        "APP",  VK_APPS,

[download]
Update: Hmmm. This should have shown up as a reply to Grandfather's post. Curious...

In reply to Re^2: Win32::GuiTest IsKeyPressed function by Util
in thread Win32::GuiTest IsKeyPressed function by coldmiser

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