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Microsoft Programmer's Library 1.3
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setprop.c
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C/C++ Source or Header
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1988-08-10
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4KB
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99 lines
/*
* SetProp
* setprop.c
*
* This program demonstrates the use of the function SetProp.
* It copies the character string and a data handle to the property
* list of the window. The string serves as a label for the data handle.
* The data handle can be retrieved from the property list at any time
* by using the GetProp function and specifying the string.
*
*/
#include "windows.h"
#include "stdio.h"
/* This is the structure that is used to put into the property list.
* It is just a sample structure.
*/
struct Data
{ short nRow, nSeat;
char szName[20];
} strSeatings = { 2, 4, "John Smith" };
/* Procedure called when the application is loaded for the first time */
BOOL WinInit( hInstance )
HANDLE hInstance;
{
WNDCLASS wcClass;
/* registering the parent window class */
wcClass.hCursor = LoadCursor( NULL, IDC_ARROW );
wcClass.hIcon = LoadIcon (hInstance, (LPSTR)"WindowIcon");
wcClass.lpszMenuName = (LPSTR)NULL;
wcClass.lpszClassName = (LPSTR)"Setprop";
wcClass.hbrBackground = (HBRUSH)GetStockObject( WHITE_BRUSH );
wcClass.hInstance = hInstance;
wcClass.style = CS_HREDRAW | CS_VREDRAW;
wcClass.lpfnWndProc = DefWindowProc;
wcClass.cbClsExtra = 0;
wcClass.cbWndExtra = 0;
RegisterClass( (LPWNDCLASS)&wcClass );
return TRUE; /* Initialization succeeded */
}
int PASCAL WinMain( hInstance, hPrevInstance, lpszCmdLine, cmdShow )
HANDLE hInstance, hPrevInstance;
LPSTR lpszCmdLine;
int cmdShow;
{
HWND hWnd; /* Handle to the parent window */
BOOL bSet; /* Boolean flag */
struct Data *hData; /* Handle to the data in the
* property list
*/
char szbuffer[50]; /* String buffer for output */
WinInit (hInstance);
hWnd = CreateWindow((LPSTR)"Setprop",
(LPSTR)"Setting the Property List",
WS_OVERLAPPEDWINDOW,
50, /* x */
50, /* y */
600, /* width */
250, /* height */
(HWND)NULL, /* no parent */
(HMENU)NULL, /* use class menu */
(HANDLE)hInstance, /* handle to window instance */
(LPSTR)NULL /* no params to pass on */
);
/* Make window visible according to the way the app is activated */
ShowWindow( hWnd, cmdShow );
UpdateWindow( hWnd );
/* Putting the structure into the property list of the window
* If it is successful, retrieve it to check if the correct structure
* is put into the property list
*/
bSet = SetProp (hWnd, (LPSTR)"Smith", (HANDLE) &strSeatings);
if (bSet)
{
MessageBox (hWnd, (LPSTR)"Property Set", (LPSTR)"OK", MB_OK);
hData = GetProp (hWnd, (LPSTR)"Smith");
sprintf (szbuffer, "%s at row %d, seat# %d",
hData->szName, hData->nRow, hData->nSeat);
MessageBox (hWnd, (LPSTR)szbuffer, (LPSTR)"Retrieved", MB_OK);
}
else
MessageBox (hWnd, (LPSTR)"Property Not Set", (LPSTR)"FAIL", MB_OK);
return 0;
}