5
我有一個功能：在另一個線程創建窗口（不是主線程）
HWND createMainWindow(P2p_Socket_Machine * toSend){
HWND hMainWnd = CreateWindow(
L"Class",/*(LPCWSTR) nameOfConference.c_str()*/L"Chat", WS_OVERLAPPED | WS_MINIMIZEBOX | WS_SYSMENU,
CW_USEDEFAULT, 0, 600,400,
(HWND)NULL, (HMENU)NULL,
/*(HINSTANCE)hlnstance*/NULL, NULL
);
if (!hMainWnd) {
MessageBox(NULL, L"Cannot create main window", L"Error", MB_OK);
return 0;
}
CreateWindowA("LISTBOX",NULL, WS_CHILD|WS_VISIBLE|WS_BORDER|WS_VSCROLL|LBS_NOTIFY|LBS_MULTIPLESEL,310,30,255,275,hMainWnd,(HMENU)List_Box,NULL,NULL);
CreateWindowExA(NULL,"BUTTON", "Refresh", WS_TABSTOP|WS_VISIBLE|WS_CHILD|BS_DEFPUSHBUTTON,385,310,100,24,hMainWnd,(HMENU)Button_Refresh, NULL ,NULL);
CreateWindowExA(NULL,"BUTTON", "Send", WS_TABSTOP|WS_VISIBLE|WS_CHILD|BS_DEFPUSHBUTTON,385,334,100,24,hMainWnd,(HMENU)Button_Send, NULL ,NULL);
CreateWindowExA(NULL,"BUTTON", "New", WS_TABSTOP|WS_VISIBLE|WS_CHILD|BS_DEFPUSHBUTTON,385,354,100,24,hMainWnd,(HMENU)Button_New, NULL ,NULL);
CreateWindowA("EDIT",0,WS_BORDER|WS_VISIBLE|WS_CHILD|ES_LEFT|ES_MULTILINE|WS_VSCROLL|WS_DISABLED,
10,30,265,275,hMainWnd,(HMENU)Text_Box_Get,NULL,NULL);
CreateWindowA("EDIT",0,WS_BORDER|WS_VISIBLE|WS_CHILD|ES_LEFT|ES_MULTILINE|WS_VSCROLL,
10,320,265,45,hMainWnd,(HMENU)Text_Box_Send,NULL,NULL);
SetWindowLongPtr(hMainWnd,GWLP_USERDATA,(LONG_PTR)toSend);
ShowWindow(hMainWnd, SW_SHOW);
//UpdateWindow(hMainWnd);
return hMainWnd;
}
這是我計劃的主要部分：）
int WINAPI WinMain(HINSTANCE hlnstance, HINSTANCE hPrevInstance, LPSTR IpCmdLine, int
nCmdShow)
{
WNDCLASSEX wc;
wc.cbSize = sizeof(wc);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = MyFunc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hlnstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = L"Class";
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
HWND toSend = createMainWindow(P2pSocket);
//some code
hThread = CreateThread(NULL, 0, ClientThread,
Message2, 0, &dwThreadId);
if (hThread == NULL)
{
cout<<"Create thread filed";
exit(10);
}
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
當我打電話功能則CreateMainWindow（在我的程序的主要部分 它的作品，因爲它應該，但是當我在我的 線程中運行它（ClientThread）這是行不通的。我讀過我應該只在主線程中創建窗口。這是真的嗎？如果這是真的，從另一個主線程調用此函數最簡單的方法是什麼？
謝謝大家。現在我知道這個問題，但我堅持解決方案。 我的客戶端線程的代碼是：直到接收消息
while(1){
vector<HWND> AllHandlers;
pair<string,string> Answer = Pointer->receiveMsgByUdp();
if(!Pointer->isMyLocalAddress(Answer.first)){
int type = messageUdpContentType(Answer.second);
switch(type){
case 0 :
Pointer->sendMsgToIpUdp(Answer.first,"<?xml version='1.0'?><accepted/>");
AllHandlers = getAllHandlersOfElementsOnWindowsByIdentityCode(Pointer->getAllHandlers(),List_Box);
for(vector<HWND>::iterator j = AllHandlers.begin();j!=AllHandlers.end();j++)
if(SendMessageA(*j, LB_FINDSTRINGEXACT, 0, (LPARAM)Answer.first.c_str())==LB_ERR)
SendMessageA(*j, LB_ADDSTRING, 0, (LPARAM)Answer.first.c_str());
break;
case 1 :
AllHandlers = getAllHandlersOfElementsOnWindowsByIdentityCode(Pointer->getAllHandlers(),List_Box);
for(vector<HWND>::iterator j = AllHandlers.begin();j!=AllHandlers.end();j++)
if(SendMessageA(*j, LB_FINDSTRINGEXACT, 0, (LPARAM)Answer.first.c_str())==LB_ERR)
SendMessageA(*j, LB_ADDSTRING, 0, (LPARAM)Answer.first.c_str());
break;
case 2 :
AllHandlers = getAllHandlersOfElementsOnWindowsByIdentityCode(Pointer->getAllHandlers(),List_Box);
for(vector<HWND>::iterator j = AllHandlers.begin();j!=AllHandlers.end();j++)
if((i = SendMessageA(*j, LB_FINDSTRINGEXACT, 0, (LPARAM)Answer.first.c_str()))!=LB_ERR)
SendMessageA(*j,LB_DELETESTRING, 0, (LPARAM)Answer.first.c_str());
break;
case 3 :
userReply = MessageBoxW(NULL, L"Принять приглашение на конференцию?",
L"", MB_YESNO | MB_ICONQUESTION);
if (userReply==IDYES){
//todo: Проверка на создание встречи, в которой уже состоишь
string nameOfConf = fetchNameOfInviteConf(Answer.second);
Pointer->createConference(nameOfConf);
HWND toSendTo = createMainWindow(Pointer);
Pointer->setHandlerInfo(nameOfConf,toSendTo);
Pointer->addNewMemberToConference_ServerType(nameOfConf,Answer.first);
string toSend = string("<?xml version='1.0'?><inviteAccepted>") + nameOfConf + string("</inviteAccepted>");
Pointer->sendMsgToIpUdp(Answer.first,toSend);
}
break;
case 4 :
string nameOfConf = fetchNameOfInviteAcceptConf(Answer.second);
toSend.clear();
Participants.clear();
Participants = Pointer->getCurrentParticipants(nameOfConf);
toSend+="<?xml version='1.0'?>";
toSend+="<conference>";
toSend+="<nameOfConference>";
toSend+=nameOfConf;
toSend+="</nameOfConference>";
for(vector<string>::iterator i = Participants.begin();i!=Participants.end();i++){
toSend+="<participant>" + *i + "</participant>";
}
toSend+="</conference>";
Pointer->addNewMemberToConference_ClientType(nameOfConf,Answer.first);
Pointer->sendToIpTcp(Answer.first,toSend);
break;
}
功能receiveMsgByUdp（）停止該線程。我對缺乏知識表示歉意，但我可以使用什麼功能或其他的東西來解決這個問題。我應該重寫我的方法receiveMsgByUdp（）是異步的，或者如何調用函數createMainWindow（）在主線程上運行？關於最後一個變體：我怎樣才能在純winapi中做到這一點，我找不到任何簡單的例子。有人可以提供代碼片段。再次感謝）
感謝每一位。我設法讓這個程序起作用。我使用了David Heffernan的方法。而這個環節上的信息http://stackoverflow.com/questions/7060686/how-do-i-sendmessage-to-a-window-created-on-another-thread – knightOfSpring 2012-03-11 15:53:36