Q151257: How to Modify a Report Preview Window Property
Article: Q151257
Product(s): Microsoft FoxPro
Version(s): windows:3.0,3.0b,6.0
Operating System(s):
Keyword(s): kbvfp600
Last Modified: 03-AUG-2000
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The information in this article applies to:
- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 6.0
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SUMMARY
=======
This article describes some windows attributes related to a Report Preview
Window. The tasks described in this article are available as commands in
Microsoft FoxPro version 2.6 for Windows as well as versions 3.0 and 3.0b. This
article describes how to disable the Minimize and Maximize properties of the
Report Preview window using API routines.
MORE INFORMATION
================
It is possible to control whether a Report Preview Window property can be
changed. The minimize/maximize attributes can be controlled by using some API
calls. In this article, the customized API routine was written using Microsoft
Visual C++ 4.0 to change the attribute of Visual FoxPro Preview Window
properties. As a default, the Visual FoxPro Report Preview Window can be
minimized or maximized by pressing the upper right-hand corner of the preview
window. Since the Report Preview Window is a system-generated window, you need
to call API routines to handle the Preview Window property.
The following sample program illustrates the contents of the .DLL file written in
Microsoft Visual C++ 4.0. It shows a way to change the attribute of Visual
FoxPro Report Preview Window successfully through the Win32 SDK.
NOTE: This sample program illustrates many Microsoft Visual C++ commands. The use
of these commands is beyond the scope of Microsoft FoxPro Product Support. Users
with substantial experience using API routines should be able to write the
following sample .DLL file. For this sample .DLL file to work, you need a .DEF
file to export the disable function.
Sample Program (DLL)
--------------------
#include <windows.h>
#define IDS_MEMVIEWCLASS 11005
BOOL APIENTRY DllMain(HANDLE hInst, DWORD ul_reason_being_called, LPVOID
lpReserved)
{
return 1;
UNREFERENCED_PARAMETER(hInst);
UNREFERENCED_PARAMETER(ul_reason_being_called);
UNREFERENCED_PARAMETER(lpReserved);
}
void APIENTRY disable(char *title, char *header)
{
HWND hWnd, // a handle for parent window
hChild; // a handle for child window
// attempt to find the parent window of report preview window
hWnd = FindWindow(NULL, title);
char title1[75];
// attempt to look for first child window
hChild = GetWindow(hWnd,GW_CHILD);
while (hChild != 0) {
hWnd = hChild;
// look for first sibling of child window
hChild = GetWindow(hWnd,GW_HWNDNEXT);
while (hChild != 0) {
hWnd = hChild;
GetWindowText(hWnd,title1,75);
if (strcmp(title1,header) == 0) {
DWORD L;
// disable minimize and maximize button of preview window
L = GetWindowLong(hChild, GWL_STYLE);
L = L & ~(WS_MINIMIZEBOX);
L = L & ~(WS_MAXIMIZEBOX);
SetWindowLong(hChild,GWL_STYLE,L);
// redraw the preview window
SetWindowPos(hChild,NULL,0,0,0,0,
SWP_DRAWFRAME|SWP_NOZORDER|SWP_NOMOVE|SWP_NOSIZE);
return;
}
hChild = GetWindow(hWnd,GW_HWNDNEXT);
}
hChild = GetWindow(hWnd,GW_CHILD);
}
return;
}
Sample Program (FoxPro)
-----------------------
REPORT FORM student PREVIEW NOWAIT
DECLARE integer disable IN disable.DLL string, string
FoxHWND = disable("Microsoft Visual FoxPro",;
"Report Designer - student.frx - Page 1")
Sample Program (Notes)
----------------------
- To create a .DLL file in Visual C++, please refer to a Help file in Microsoft
Visual C++ 4.0.
- Make a note that the Disable.dll should be in the same directory as your
project, or should be in the path of the Windows Win32 directory.
The API function needs two parameters. The first parameter is the main project
window that is usually a Visual FoxPro window. The caption must be identical.
The second parameter is the caption of preview window where you want to
disable the minimize/maximize buttons. If, for any reason, the program does
not work properly, you need to check the captions of those two windows prior
to running the program.
Additional query words: VFoxWin akz
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Keywords : kbvfp600
Technology : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b kbVFP600
Version : windows:3.0,3.0b,6.0
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