自定義過程/函式方法：
//傳送字串到指字句柄的視窗中 (接收窗體需用傳送時的訊息常量wm_copydata)
procedure sendmessagedata(ahandle: thandle; astr: string);
varsdata: tcopydatastruct;
begin
sdata.cbdata := length(astr) + 1;
//為傳遞的資料分配記憶體
getmem(sdata.lpdata,sdata.cbdata );
trystrcopy(sdata.lpdata,pchar(astr));
//傳送wm_copydata訊息
sendmessage(ahandle,wm_copydata,0,cardinal(@sdata));
finally
freemem(sdata.lpdata); //釋放資源
end;
end;
//傳送訊息到指字句柄的視窗中
procedure sendmymessage(ahandle: thandle; amsg:word);
begin
sendmessage(ahandle,amsg,0,0)
end;
//------------------
呼叫：sendmessagedata(tform(findglobalcomponent('frmhint')).handle,'abc');
sendmymessage(tform(findglobalcomponent('frmhint')).handle, wm_user+1001);
'frmhint' 是你想要接收訊息的窗體的name
//******************************===
在接收的窗體中定義如下常量及過程
const
wm_mydefmsg = wm_user+1001;
宣告部分：
procedure wmcopydata(var amsg: twmcopydata); message wm_copydata;
procedure receiedformmsg(var msg :tmsg); message wm_mydefmsg;
過程實體:
//接收傳送的字串，即預定訊息wm_copydata
procedure wmcopydata(var amsg: twmcopydata);
var s : string;
begin
s := strpas(amsg.copydatastruct^.lpdata);
//to do something
end;
//接收預定的訊息
procedure receiedformmsg(var msg: tmsg);
begin
//make you want to do
end;
子類（子窗體）向主窗體傳送訊息
這裡演示的是，在主窗體 塊中，重寫攔截資訊方法。首先新建乙個類 這個類名定義為msg dllimport user32.dll entrypoint sendmessage private static extern intptr sendmessage int hwnd,int msg,intpt...
c 向MFC窗體傳送訊息
using system using system.collections.generic using system.linq using system.text using system.threading.tasks using system.runtime.interopservices na...
程序間傳遞訊息（傳送和接收系統訊息）
unit unit1 inte ce uses windows,messages,sysutils,variants,classes,graphics,controls,forms,dialogs,stdctrls type tform1 class tform button1 tbutton pr...