IME方式也很简单，IME不过是一个有着固定输出函数的DLL文件而已。
下面是我的输入法的部分代码
DLL中的固定的输出函数：
//初始化输入法函数
function ImeInquire(var lpImeInfo: IMEINFO; lpszUIClass: PChar; lpszOptions:
PChar): Bool; stdcall;
//设置输入法状态函数，如光标跟随等
function ImeConfigure(cfghKL: HKL; AhWnd: HWND; dwMode: DWord; lpData: Pointer):
Bool; stdcall;
//自定义汉字编码格式
function ImeConversionList(hIMC: HIMC; lpSource: PChar;
lpCandList: PCANDIDATELIST; dwBufLen: DWord; uFlag: Word): DWord;
stdcall;
//退出
function ImeDestroy(uForce: Word): Bool; stdcall;
//应用接口函数
function ImeEscape(hIMC: HIMC; uSubFunc: Word; lpData: Pointer): LRESULT;
stdcall;
//用户按键处理函数，例如中英文状态，返回 FALSE 为英文状态，按键不作处理。
function ImeProcessKey(hIMC: HIMC; vKey: Word; lKeyData: LPARAM;
const lpbKeyState: PBYTE): Bool; stdcall;
//启动输入法设置功能
function ImeSelect(hImc: HIMC; fSelect: Bool): Bool; stdcall;
//设置输入活动状态
function ImeSetActiveContext(hImc: HIMC; fFlag: Bool): Bool; stdcall;
//将用户按键转换为汉字编码
function ImeToAsciiEx(uVirtKey: Word; uScaCode: Word; const lpbKeyState: PBYTE;
lpdwTransBuf: PDWord; fuState: Word; hImc: HIMC): Word; stdcall;
//处理IME消息函数
function NotifyIME(hIMC: HIMC; dwAction: DWord; dwIndex: DWord;
dwValue: DWord): Bool; stdcall;
//自定义汉字编码格式，未作处理。
function ImeRegisterWord(lpRead: PChar; dw: DWord;
lpStr: PChar): Bool; stdcall;
//自定义汉字编码格式，未作处理。
function ImeUnregisterWord(lpRead: PChar; dw: DWord;
lpStr: PChar): Bool; stdcall;
//自定义汉字编码格式，未作处理。
function ImeGetRegisterWordStyle(nItem: Word; lp: PSTYLEBUF): Word; stdcall;
//自定义汉字编码格式，未作处理。
function ImeEnumRegisterWord(lpfn: REGISTERWORDENUMPROC; lpRead: PChar;
dw: DWord; lpStr: PChar; lpData: Pointer): Word; stdcall;
//输入法编码字符处理。
function ImeSetCompositionString(hIMC: HIMC; dwIndex: DWord;
lpComp: Pointer; dwComp: DWord; lpRead: Pointer;
dwRead: DWord): Bool; stdcall;
//UI窗口过程
function UIWndProc(hUIwnd: HWND; uMsg: Word; wParam: WPARAM;
lParam: LPARAM): LRESULT; stdcall;
//状态窗口过程
function StatusWndProc(AhWnd: HWND; uMsg: Word; wParam: WPARAM;
lParam: LPARAM): LRESULT; stdcall;
//侯选汉字窗口过程
function CandWndProc(AhWnd: HWND; uMsg: Word; wParam: WPARAM;
lParam: LPARAM): LRESULT; stdcall;
//编码窗口过程
function CompWndProc(AhWnd: HWND; uMsg: Word; wParam: WPARAM;
lParam: LPARAM): LRESULT; stdcall;
