根据虚拟键获取字符

/** 
 * 函数名称: GetCharFromKey
 * 函数功能：返回键盘输入的字符
 * 函数参数：
 *			wKey 键盘虚拟键
 * 返回值： 返回虚拟键对应的字符，无匹配则返回 ' '
 */
TCHAR GetCharFromKey(WORD wKey)
{
	TCHAR cKey = _T(' ');

	if (wKey >= 0x41 && wKey <= 0x5A)	// A-Z
	{
		cKey = wKey;
	}
	else if (wKey >= 0x60 && wKey <= 0x69) // numpad
	{
		cKey = wKey - 0x30;
	}
	else
	{
		int nPress = GetAsyncKeyState(VK_SHIFT);

		switch (wKey)
		{
		case 0xC0:
			if (nPress)
				cKey = 0x7E;	// ~
			else
				cKey = 0x60;	// `
			break;
		case 0x31:
			if (nPress)
				cKey = 0x21;	// !
			else
				cKey = 0x31;	// 1
			break;
		case 0x32:
			if (nPress)
				cKey = 0x40;	// @
			else
				cKey = 0x32;	// 2
			break;
		case 0x33:
			if (nPress)
				cKey = 0x23;	// #
			else
				cKey = 0x33;	// 3
			break;
		case 0x34:
			if (nPress)
				cKey = 0x24;	// $
			else
				cKey = 0x34;	// 4
			break;
		case 0x35:
			if (nPress)
				cKey = 0x25;	// %
			else
				cKey = 0x35;	// 5
			break;
		case 0x36:
			if (nPress)
				cKey = 0x5E;	// ^
			else
				cKey = 0x36;	// 6
			break;
		case 0x37:
			if (nPress)
				cKey = 0x26;	// &
			else
				cKey = 0x37;	// 7
			break;
		case 0x38:
			if (nPress)
				cKey = 0x2A;	// *
			else
				cKey = 0x38;	// 8
			break;
		case 0x39:
			if (nPress)
				cKey = 0x28;	// (
			else
				cKey = 0x39;	// 9
			break;
		case 0x30:
			if (nPress)
				cKey = 0x29;	// )
			else
				cKey = 0x30;	// 0
			break;
		case 0xBD:
			if (nPress)
				cKey = 0x2D;	// -
			else
				cKey = 0x5F;	// _
			break;
		case 0xBB:
			if (nPress)
				cKey = 0x2B;	// +
			else
				cKey = 0x3D;	// =
			break;
		case 0xDC:
			if (nPress)
				cKey = 0x7C;	// |
			else
				cKey = 0x5C;	// '\'
			break;
		case 0xDB:
			if (nPress)
				cKey = 0x7B;	// {
			else
				cKey = 0x5B;	// [
			break;
		case 0xDD:
			if (nPress)
				cKey = 0x7D;	// }
			else
				cKey = 0x5D;	// ]
			break;
		case 0xBA:
			if (nPress)
				cKey = 0x3A;	// :
			else
				cKey = 0x3B;	// ;
			break;
		case 0xDE:
			if (nPress)
				cKey = 0x22;	// "
			else
				cKey = 0x27;	// '
			break;
		case 0xBC:
			if (nPress)
				cKey = 0x3C;	// <
			else
				cKey = 0x2C;	// ,
			break;
		case 0xBE:
			if (nPress)
				cKey = 0x3E;	// >
			else
				cKey = 0x2E;	// .
			break;
		case 0xBF:
			if (nPress)
				cKey = 0x3F;	// ?
			else
				cKey = 0x2F;	// /
			break;
		case 0x6F:
			cKey = 0x2F;		// /
			break;
		case 0x6A:
			cKey = 0x2A;		// *
			break;
		case 0x6D:
			cKey = 0x2D;		// -
			break;
		case 0x6B:				// +
			cKey = 0x2B;
			break;
		case 0x6E:
			cKey = 0x2E;		// .
			break;
		default:
			break;
		}
	}

	return cKey;
}