unit Ime;

interface

uses IMM, Windows;

  procedure ImmActive(hWindows: THandle; bChinese: Boolean);  //打开或关闭输入法
  procedure ImmEnabled(hWindows: THandle; bChinese: Boolean); //允许或禁止输入法
  procedure SendDBCSString(hFocus: HWND; const Text: string); //向控件发送中文文本

implementation

//打开或关闭输入法，EX:ImeActive(0, true);
//网上可以搜索到类似的代码，不过用的是IME_THOTKEY_IME_NONIME_TOGGLE，只对繁体版中文Windows有效，用在简体中文Windows下当然不行了
procedure ImmActive(hWindows: THandle; bChinese: Boolean);
begin
  if hWindows=0 then hWindows := GetFocus;
  if hWindows=0 then Exit;
  if ImmIsIME(GetKeyboardLayOut(0)) <> bChinese then
    ImmSimulateHotKey(hWindows, IME_CHOTKEY_IME_NONIME_TOGGLE);
end;

//允许与禁止输入法，EX:ImmEnabled(Edit1.Handle, true)
//等效于把Edit1.ImeMode设为imChinese（True）、imClose（False）
procedure ImmEnabled(hWindows: THandle; bChinese: Boolean);
var
  hImmc: HIMC;
begin
  if hWindows=0 then hWindows := GetFocus;
  if hWindows=0 then Exit;
  hImmc := ImmGetContext(hWindows);
  ImmSetOpenStatus(hImmc, bChinese);
end;

//向控件发送中文文本，EX:SendDBCSString(Edit1.Handle, '哗，终于可以发中文啦！')
procedure SendDBCSString(hFocus: HWND; const Text: string);
var
  i: integer;
  ch: byte;
begin
  if hFocus = 0 then hFocus := GetFocus;
  if hFocus = 0 then Exit;
  i := 1;
  while i <= Length(Text) do begin
    ch := byte(Text[i]);
    if Windows.IsDBCSLeadByte(ch) then begin
      Inc(i);
      SendMessage(hFocus, WM_IME_CHAR, MakeWord(byte(Text[i]), ch), 0);
    end
    else SendMessage(hFocus, WM_IME_CHAR, word(ch), 0);
    Inc(i);
  end;
end;

end.