FSX Popup windows
Here is a short tutorial on how to create popup windows from a C++ gauge or SimConnect module dll. Do note that i will not be going into where to execute the creation functions from the gauge or SimConnect dll.
First off, in your header file, add the following declarations:
[CODE]
- include <windows.h>
- include <process.h>
bool CreateWin(); bool ExitWin(); DWORD WINAPI WinThread(LPVOID lpParam); bool RegisterWin(); LRESULT CALLBACK WinQueue(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); //Replace Win with any identifier name you want [/CODE]
Then, in your cpp file, create the thread that the window message cue will be run from.
[CODE] bool CreateWin() { CreateThread(0, NULL, WinThread, NULL, NULL, NULL); return true; //returns true so that you can know that you have sent the command to open the new window } [/CODE]
Also create a function to call to shut down the window(This window does come with a little red box in the upper right corner so this function is just an alternative(also can be called on shutdown)).
[CODE] bool ExitWin() { SendMessage(hwnd, WM_CLOSE, 0, 0); return false; } [/CODE]
Next is your function to register the class. Note that i have made it a template of the FS98FLOAT class to save some code lines.
[CODE] bool RegisterWin() { WNDCLASSW wc; memset(&wc,0,sizeof(WNDCLASS)); if(GetClassInfo(NULL, L"FS98FLOAT", &wc)) { wc.lpszClassName = L"MYFLOAT";//Choose your class name wc.hInstance = GetModuleHandle(L"MY_DLL.dll");//place your dll name here wc.lpfnWndProc = (WNDPROC) WinQueue;//Your message que function wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); if(RegisterClass(&wc)) return true; else return false; } else return false; } [/CODE]
And now your thread function
[CODE] DWORD WINAPI ACMProc(LPVOID lpParam) { MSG msg; RegisterWin();//Register the class hwnd = CreateWindowEx( WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR | WS_EX_TOOLWINDOW | WS_EX_WINDOWEDGE,//necessary styles etc L"MYFLOAT", // Your class name L"My Window",//Window caption WS_CAPTION | WS_POPUP | WS_CLIPSIBLINGS | WS_SYSMENU | WS_THICKFRAME,//necessary styles etc 0,0, 800,600,//Window position/Dimensions FindWindow(L"FS98MAIN", L"Microsoft Flight Simulator X"),//The Parent window NULL, GetModuleHandle(L"My_DLL.dll"), NULL ); ShowWindow (hwnd, SW_SHOWNORMAL);//Shows the window while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return 1; } [/CODE]
And finally, the message cue. You can do pretty much whatever you want from here out
[CODE] LRESULT CALLBACK ACMQueue(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch(message) { case WM_CREATE: // sent by the windows system just before the window will be displayed the first time
// here is the best location to prepare your window i.e. connecting to SimConnect
break; case WM_ERASEBKGND: // sent by windows if the entire window will be renewed. break; // if you create your own background, do it here in and return (1) instead using 'break' case WM_PAINT: { PAINTSTRUCT ps; HDC hdc; wchar_t *WinOutput[] = {{L"Hello World!"},{L"This window was created out of a DLL."}}; hdc = BeginPaint(hwnd, &ps); // now we have a valid device context to modify the window's content TextOut(hdc,20,20,WinOutput[0],wcslen(WinOutput[0])); MoveToEx(hdc,20,40,NULL); LineTo(hdc,120,40); TextOut(hdc,20,60,WinOutput[1],wcslen(WinOutput[1])); // do all drawing of your window here in
EndPaint(hwnd,&ps); } break; case WM_DESTROY: // sent by the windows system just before the window will be destroyed // disconnect from SimConnect out of this message break; case WM_CLOSE: Vd->INIS->AcmWin = false; break; } return (DefWindowProcA(hwnd, message, wParam, lParam));
} [/CODE]
Enjoy!!
