#Foxpro 2.6 commands with example 32 bit
#Foxpro 2.6 commands with example code
#Foxpro 2.6 commands with example windows

ISAM-type data source selection dialog class Here is a table of the files and classes.

#Foxpro 2.6 commands with example code

The EX32A example includes source code listings and resource requirements. The dialog bar shows the SQL statement associated with the active view window.ДЇigure 32-2.

#Foxpro 2.6 commands with example windows

The two view windows in the upper part of the main window are tied to the same document, and the lower view window is tied to another document. You can learn a lot about this application by looking at the three-view window in Figure 32-2. As you will see, the code for opening the database is different depending on the data source type. The user must choose one of these commands after opening a document. The document's File menu includes the following commands:

Figure 32-2 shows the EX32A program in operation. AppWizard generates the usual MDI main frame, document, application, and view classes, and we change the view class base to CRowView and add the DAO-specific code. The application dynamically displays tables in scrolling view windows, and it allows the user to type in the SQL QUERY statement, which is stored in the document along with data source and table information. If you set for minimum memory, for example 20000, then in complex commands the application hangs.Now we'll put everything together and build another working programВ—an MDI application that connects to any DAO data source. I have made a lot of experimentation, and my recommendation is 16000. In FoxPro 2.6 for Win you cannot use more then 16384 for MEMLIMIT parameters, because this version is a 16-bit application. The application works faster and you can run complex commands without memory errors. >After restarting Foxpro, SYS(1001) return about 16 Mb. In same time you have 512 MbвЂ¦ It is useful to add a statement in your CONFIG.FPW file, like this: In this environment if you try to execute complex commands, for example to index a table with 1000000 records, you will obtain a вЂњout of memoryвЂќ error.

This isnвЂ™t dependent on the amount of memory installed in the computer. For example without MEMLIMIT, SYS(1001) returns around 1.3 Mb(!!!). >Opposite to DOS version, windows version attempts to use small amount of memory.

#Foxpro 2.6 commands with example 32 bit

In FoxPro 2.6 for DOS (extended) you can use for parameter more then 16384, because this is a 32 bit application. >After restarting Foxpro, SYS(1001) return about 20 Mb. It is useful to add a statement in your CONFIG.FP file, like this: In some windows versions you can limit maximum amount of DPMI memory (shortcut properties), but on some this not helps. If this is the only application you are using вЂ“ OK, but if notвЂ¦ All other FoxPro (DOS/Win) sessions, and other applications also, are going to run very slowly. For example if you have 512 Mb installed on the computer, without MEMLIMIT, then SYS(1001) вЂ“ all memory available to the FoxPro memory manager вЂ“ returns around 350 Mb (depends on other programs running). >This version attempts to use all available DPMI memory. >MEMLIMIT = % of available memory, Minimum memory (K), Maximum memory (K) >I found that when using Foxpro 2.6 in a Win 32 OS, it is strongly recommended to use MEMLIM command in CONFIG.FP or CONFIG.FPW starting files. They are from my experience you can comment them here. Here are some practical additions to this article. >Recently Ed Rauh posted FAQ#15468, very useful information about memory usage in old versions of FoxPro and practical guidelines. You can mark your message as a solution so it would be easier found in searches. It's usefull info for people who still support Fox 2.x application.