Measurement-computing Personal488 rev.3.0 For DOS & Windows 3.Xi Uživatelský manuál stáhnout pdf (Strana 238)

II. SOFTWARE GUIDES - 10. Driver488/W31 10E. C Languages

Personal488 User’s Manual, Rev. 3.0 II-223

/*******************************************************************/

/* */

/* nCwRegisterClasses Function */

/* */

/* The following function registers all the classes of all the */

/* windows associated with this application. The function returns */

/* an error code if unsuccessful, otherwise it returns 0. */

/* */

/*******************************************************************/

int nCwRegisterClasses(void)

{

WNDCLASS wndclass; /* struct to define a window class */

memset(&wndclass, 0x00, sizeof(WNDCLASS));

/* load WNDCLASS with window’s characteristics */

wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_BYTEALIGNWINDOW;

wndclass.lpfnWndProc = WndProc;

/* Extra storage for Class and Window objects */

wndclass.cbClsExtra = 0;

wndclass.cbWndExtra = 0;

wndclass.hInstance = hInst;

wndclass.hIcon = LoadIcon(hInst, “EXAMPLE2");

wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

/* Create brush for erasing background */

wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);

wndclass.lpszMenuName = szAppName; /* Menu Name is App Name */

wndclass.lpszClassName = szAppName; /* Class Name is App Name*/

if (!RegisterClass(&wndclass))

return -1;

return(0);

} /* End of nCwRegisterClasses */

/*******************************************************************/

/* cwCenter Function */

/* */

/* centers a window based on the client area of its parent */

/* */

/*******************************************************************/

void cwCenter(hWnd, top)

HWND hWnd;

int top;

{

POINT pt;

RECT swp;

RECT rParent;

int iwidth;

int iheight;

/* get the rectangles for the parent and the child */

GetWindowRect(hWnd, &swp);

GetClientRect(hWndMain, &rParent);

/* calculate the height and width for MoveWindow */

iwidth = swp.right - swp.left;

iheight = swp.bottom - swp.top;

/* find the center point and convert to screen coordinates */

pt.x = (rParent.right - rParent.left) / 2;

pt.y = (rParent.bottom - rParent.top) / 2;

ClientToScreen(hWndMain, &pt);

/* calculate the new x, y starting point */

pt.x = pt.x - (iwidth / 2);

pt.y = pt.y - (iheight / 2);

/* top will adjust the window position, up or down */

if (top)

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