https://issues.dlang.org/show_bug.cgi?id=16658
--- Comment #1 from j...@red.email.ne.jp --- Forgot to mention: The value cooperating with this is defined that _WIN32_WINNT = 0x501 ( means WinXP ) So I suppose that _WIN32_IE should be changed as follows. version (IE10) { } else version (IE9) { } else version (IE8) { ... snipped ... } else static if (_WIN32_WINNT >= 0x501) { // ADD enum uint _WIN32_IE = 0x600; // ADD } else static if (_WIN32_WINNT >= 0x410) { enum uint _WIN32_IE = 0x400; // this is used now } else { --