DLL中能有自己的消息循环结构吗？

tempblack 2012-07-24 09:07:52

DLL中能有自己的消息循环结构吗？
如果可以的话，加上调用程序的消息循环结构，整个程序就有两套消息循环结构了？那消息处理会不会混乱了？

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sivenyu 2012-08-23

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跑是跑起来的，但因为用HWND_MESSAGE，受Message-Only Windows限制，改用正常方式创建窗口后我自己问题解决了，参考帖子：
http://topic.csdn.net/t/20030106/17/1332183.html

附：
Message-Only Windows
A message-only window enables you to send and receive messages. It is not visible, has no Z order, cannot be enumerated, and does not receive broadcast messages. The window simply dispatches messages.

To create a message-only window, specify the HWND_MESSAGE constant or a handle to an existing message-only window in the hWndParent parameter of the CreateWindowEx function. You can also change an existing window to a message-only window by specifying HWND_MESSAGE in the hWndNewParent parameter of the SetParent function.

titer1 2012-08-23

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上面代码有说服力但是还不能跑起来，是不是

titer1 2012-08-23

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上面代码有说服力但是还不能跑起来，是不是

sivenyu 2012-08-22

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下面代码，已经在DLL入口new一个线程，然后new窗口以及消息循环，但从TRACE看，MessageOnlyWinProc消息处理函数，只能响应开始几个消息，后面就是在GetMessage死掉了！

LRESULT CALLBACK MessageOnlyWinProc(HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
TRACE(TEXT("MessageOnlyWinProc msg(%d)\n"), uMsg);

switch(uMsg)
{
case WM_MY_MSG:
TRACE(TEXT("WM_MY_MSG\n"));
break;

case WM_CLOSE:
glbExit = true;
TRACE(TEXT("WM_CLOSE\n"));
DestroyWindow(hwnd);
break;

case WM_DESTROY:
glbExit = true;
TRACE(TEXT("WM_CLOSE\n"));
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}

return 0;
}

BOOL InitMessageOnlyWindow()
{
HINSTANCE hInstance = NULL;
hInstance = GetModuleHandle(NULL);

if (hInstance == NULL)
{
return FALSE;
}

WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
wndcls.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndcls.hInstance=hInstance;
wndcls.lpfnWndProc=MessageOnlyWinProc;
wndcls.lpszClassName=TEXT("Message-Only Window");
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW | CS_VREDRAW;
RegisterClass(&wndcls);

m_hwnd = CreateWindowEx(0,
TEXT("Message-Only Window"),
TEXT("Message-Only Window"),
0,0,0,
0,0,
HWND_MESSAGE,
0,
hInstance,
0);
if (m_hwnd == NULL)
{
TRACE(TEXT("CreateWindowEx failed!\n"));
return FALSE;
}

MSG msg = {0};
while (::GetMessage(&msg,m_hwnd,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return TRUE;
}

DWORD WINAPI DllThreed(LPVOID lpParameter)
{
InitMessageOnlyWindow();
return 0;
}

BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch(ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
{
ghModule = hModule;
static HANDLE hThreed = NULL;
if(!hThreed)
hThreed = ::CreateThread(NULL, 0, DllThreed, NULL, 0, NULL);
}
break;
}

return TRUE;
}

#ifdef _MANAGED
#pragma managed(pop)
#endif

sivenyu 2012-08-22