home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Microsoft Programmer's Library 1.3
/
Microsoft-Programers-Library-v1.3.iso
/
sampcode
/
win_lrn
/
graphics
/
crpenin.c
< prev
next >
Wrap
C/C++ Source or Header
|
1988-08-10
|
4KB
|
131 lines
/*
* Function Name: CreatePenIndirect
*
* Description:
* This program creates a logical pen that replaces the current pen for the
* device. It uses the data structure LOGPEN to set up the style, width,
* and color fields. With lopnWidth, the data structure is type POINT.
* The x value is the width, and the y value is ignored. Unlike CreatePen,
* the structure for LOGOPEN must first be allocated before values can be
* assigned.
*/
#include "windows.h"
long FAR PASCAL WndProc (HWND, unsigned, WORD, LONG);
HPEN hPen, hOldPen; /* Global Handles to Pens */
/***********************************************************************/
void CALL_CreatePenIndirect (hWnd)
HWND hWnd;
{
LOGPEN PenIndirect;
POINT Point1;
Point1.x = 10; /* assign width 10 to x. */
Point1.y = 0; /* y is ignored. */
PenIndirect.lopnStyle = 0; /* style is 0 */
PenIndirect.lopnWidth = Point1; /* width is Point1. */
PenIndirect.lopnColor = RGB (255, 0, 0); /* color is red. */
hPen = CreatePenIndirect ( (LPLOGPEN) & PenIndirect); /* pen created */
if (hPen == NULL) /* checks for successful pen creation */
{
MessageBox (hWnd, (LPSTR)"CreatePenIndirect failed",
(LPSTR)"ERROR", MB_ICONHAND | MB_OK);
DestroyWindow (hWnd); /* The pen wasn't created, so trash the program */
return;
}
return;
}
int PASCAL WinMain (hInstance, hPrevInstance, lpszCmdLine, cmdShow)
HANDLE hInstance, hPrevInstance;
LPSTR lpszCmdLine;
int cmdShow;
{
MSG msg;
HWND hWnd;
HMENU hMenu;
if (!hPrevInstance)
{
WNDCLASS wcClass;
wcClass.style = CS_HREDRAW | CS_VREDRAW;
wcClass.lpfnWndProc = WndProc;
wcClass.cbClsExtra = 0;
wcClass.cbWndExtra = 0;
wcClass.hInstance = hInstance;
wcClass.hIcon = LoadIcon (hInstance, NULL);
wcClass.hCursor = LoadCursor (NULL, IDC_ARROW);
wcClass.hbrBackground = (HBRUSH)GetStockObject (WHITE_BRUSH);
wcClass.lpszMenuName = (LPSTR)NULL;
wcClass.lpszClassName = (LPSTR)"CreatePenIndirect";
if (!RegisterClass ( (LPWNDCLASS) & wcClass))
return FALSE;
}
hWnd = CreateWindow ( (LPSTR)"CreatePenIndirect",
(LPSTR)"CreatePenIndirect ()",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
(HWND)NULL, /* no parent */
(HMENU)NULL, /* use class menu */
(HANDLE)hInstance, /* handle to window instance */
(LPSTR)NULL); /* no params to pass on */
ShowWindow (hWnd, cmdShow);
UpdateWindow (hWnd);
while (GetMessage ( (LPMSG) & msg, NULL, 0, 0))
{
TranslateMessage ( (LPMSG) & msg);
DispatchMessage ( (LPMSG) & msg);
}
return (int)msg.wParam;
}
/* Procedures which make up the window class. */
long FAR PASCAL WndProc (hWnd, message, wParam, lParam)
HWND hWnd;
unsigned message;
WORD wParam;
LONG lParam;
{
PAINTSTRUCT ps;
switch (message)
{
case WM_CREATE:
CALL_CreatePenIndirect (hWnd);
break;
case WM_PAINT:
BeginPaint (hWnd, (LPPAINTSTRUCT) & ps);
hOldPen = SelectObject (ps.hdc, hPen);
Arc (ps.hdc, 0, 0, 300, 200, 200, 140, 100, 30);
SelectObject (ps.hdc, hOldPen);
ValidateRect (hWnd, (LPRECT) NULL);
EndPaint (hWnd, (LPPAINTSTRUCT) & ps);
break;
case WM_DESTROY:
DeleteObject (hPen);
PostQuitMessage (0);
break;
default:
return DefWindowProc (hWnd, message, wParam, lParam);
break;
}
return (0L);
}