32-bit assembler in Windows C code-Chapter 4

The compiling environment is VC ++ 6.0.

 

(1) first Window Function

FirstWindow. c# Include <windows. h> </p> <p> lresult callback ProcWinMain (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) <br/>{< br/> PAINTSTRUCT stPs; <br/> RECTstRect; <br/> HDChDc; </p> <p> switch (uMsg) <br/>{< br/> case WM_PAINT: <br/> hDc = BeginPaint (hWnd, & stPs); <br/> GetClientRect (hWnd, & stRect); <br/> DrawText (hDc, TEXT ("Win32 Programing, simple and Powerful "),-1, & stRect, DT_SINGLELINE | DT_CENTER | DT_VCENTER); <br/> EndPaint (hWnd, & stPs); <br/> return 0; </p> <p> case WM_CLOSE: <br/> DestroyWindow (hWnd); <br/> PostQuitMessage (0); <br/> return 0; <br/>}< br/> return DefWindowProc (hWnd, uMsg, wParam, lParam); <br/>}</p> <p> int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) <br/>{< br/> WNDCLASSEXstWndCls; <br/> msstmsg; <br/> HWNDhWnd; </p> <p> RtlZeroMemory (& stWndCls, sizeof (stWndCls); <br/> stWndCls. hCursor = LoadCursor (NULL, IDC_ARROW); <br/> stWndCls. hIcon = LoadIcon (NULL, IDI_APPLICATION); <br/> stWndCls. hIconSm = LoadIcon (NULL, IDI_APPLICATION); <br/> stWndCls. cbWndExtra = 0; <br/> stWndCls. cbClsExtra = 0; <br/> stWndCls. hInstance = hInstance; <br/> stWndCls. cbSize = sizeof (WNDCLASSEX); <br/> stWndCls. style = CS_HREDRAW | CS_VREDRAW; <br/> stWndCls. lpfnWndProc = ProcWinMain; <br/> stWndCls. hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH); <br/> stWndCls. lpszClassName = TEXT ("MyClass"); <br/> stWndCls. lpszMenuName = NULL; </p> <p> RegisterClassEx (& stWndCls); </p> <p> hWnd = createjavaswex (WS_EX_CLIENTEDGE, TEXT ("MyClass "), TEXT ("My First Window"), <br/> WS_OVERLAPPEDWINDOW, 100,100,600,400, NULL, NULL, hInstance, NULL); <br/> createmediawex (0, TEXT ("Button"), TEXT ("& OK"), WS_CHILD | WS_VISIBLE, 10, 10, 65, 22, hWnd, (HMENU) 1, hInstance, NULL ); <br/> ShowWindow (hWnd, SW_SHOWNORMAL); <br/> UpdateWindow (hWnd); </p> <p> while (GetMessage (& stMsg, NULL, 0, 0) <br/>{< br/> TranslateMessage (& stMsg); <br/> DispatchMessage (& stMsg); <br/>}< br/> return stMsg. wParam; <br/>}

 

(2) Communication between windows

// The Receive. c code of the message sending and receiving program between Windows adds variable definitions in the FirstWindow. c code ProcWinMain function:

TCHAR buffer [512]; <br/> TCHAR szFmt [] = TEXT ("Received WM_SETTEXT message/nparam: % 08x/ntext: % s ");

 

// Add the following code after processing the WM_PAINT message code segment:

Case WM_SETTEXT: <br/> wsprintf (buffer, szFmt, lParam, lParam); </p> <p> MessageBox (NULL, buffer, TEXT ("Success! "), MB_ OK | MB_ICONINFORMATION); <br/> return 0; </p> <p>

 

// Sending function Send. c code:

# Include <windows. h> </p> <p> HWND hWnd; <br/> TCHAR szBuffer [256]; </p> <p> const TCHAR szCaption [] = TEXT ("SendMessage"); <br/> const TCHAR szStart [] = TEXT ("Press OK start SendMessage, param: % 08x "); <br/> const TCHAR szReturn [] = TEXT (" SendMessage returned! "); <Br/> const TCHAR szDestClass [] = TEXT (" MyClass "); <br/> const TCHAR szText [] = TEXT ("Text send to other windows "); <br/> const TCHAR szNotFound [] = TEXT ("Receive Message Window not found"); </p> <p> int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR using line, int iCmdShow) <br/>{< br/> if (hWnd = FindWindow (szDestClass, NULL ))! = NULL) <br/>{< br/> wsprintf (szBuffer, szStart, szText); <br/> MessageBox (NULL, szBuffer, szCaption, MB_ OK ); <br/> SendMessage (hWnd, WM_SETTEXT, 0, (LPARAM) szText); <br/> MessageBox (NULL, szReturn, szCaption, MB_ OK ); <br/>}< br/> else <br/> MessageBox (NULL, szNotFound, szCaption, MB_ OK); <br/> return 0; <br/>}</p> <p>

 

(3) data transmission between windows

// Replace the case: WM_SETTEXT section in the received Code Receive. c In (2):

Case WM_COPYDATA: <br/> wsprintf (buffer, szFmt, (COPYDATASTRUCT *) lParam)-> lpData, (COPYDATASTRUCT *) lParam)-> lpData ); <br/> MessageBox (NULL, buffer, TEXT ("Success! "), MB_ OK | MB_ICONINFORMATION); <br/> return 0; </p> <p>

 

// Change the WinMain in the Send. c file in (2):

Int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR CmdLine, int iCmdShow) <br/>{< br/> COPYDATASTRUCT stCDS; <br/> stCDS. cbData = sizeof (szText); <br/> stCDS. dwData = 0; <br/> stCDS. lpData = szText; <br/> if (hWnd = FindWindow (szDestClass, NULL ))! = NULL) <br/>{< br/> wsprintf (szBuffer, szStart, szText); <br/> MessageBox (NULL, szBuffer, szCaption, MB_ OK ); <br/> // SendMessage (hWnd, WM_SETTEXT, 0, (LPARAM) szText); <br/> SendMessage (hWnd, WM_COPYDATA, 0, (LPARAM) & stCDS ); <br/> MessageBox (NULL, szReturn, szCaption, MB_ OK); <br/>}< br/> else <br/> MessageBox (NULL, szNotFound, szCaption, MB_ OK ); <br/> return 0; <br/>}