PowerBuilder - Miscellaneous Notes

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PowerBuilder - Miscellaneous Notes

PowerBuilder 6.5 Connection settings for Oracle Synonyms :

   ,JVOGEL_SE,"SYNONYM","TABLE","VIEW"

Question : How do I get a feature added to future versions of PowerBuilder?

Answer : Send a message to Cathy Col at with the subject "Enhancement Request". All messages with this subject are pooled and added to a running list.

Anybody [with a Sybase Support contract] can Submit a Bug Report or Enhancement Request on any Sybase Product using the following link : http://support.sybase.com/ and click on "Case Management"

Question : How do I "rollback" a change made in a descendant?

Answer : Select the menu item Edit->Reset Attributes.

Question : Should I use events or functions in my application?

*Answer :* PB 5.0 and up
Events	Functions
- Are only public - If using old syntax, existance is not checked at compile time - If using new syntax with the 'dynamic' keyword, if event does not exist at run-time and the calling script is not expecting a return value, the event will fail 'silently'	- Can be public, private or protected - If using old syntax, must be a valid method for the class at compile time - If using new syntax with the 'dynamic' keyword, if function does not exist at run-time an execution error occurs

Question : Can I get user, GDI and system resources in 32-bit?

Answer : Yes, but first you have to install the Win95 Resource Meter. If it's not installed, go to Control Panel->Add/Remove Programs->Windows Setup tab->Accessories->Details->System Resource Meter. This will cause a DLL named RSRC32.DLL to be installed.

Now, declare an external function as follows:

    function integer GetFreeResources (integer WhichResource) &
            library "rsrc32.dll" alias for "_MyGetFreeSystemResources32@4"

In addition, you will need three constants:

    constant integer SYSTEMRESOURCES = 0
    constant integer GDIRESOURCES = 1
    constant integer USERRESOURCES = 2

Question : What are the PowerBuilder equivalents to the Windows SDK datatypes (hWnd, lpStr, etc.)?

Answer :

Windows SDK	PowerBuilder 16-bit	PowerBuilder 32-bit
bool	boolean	boolean
char*	ref string	ref string
colorref	uint	ulong
dword	uint	ulong
handle	uint	ulong
hdc	uint	ulong
hfile	uint	ulong
hinstance	uint	ulong
hwnd	uint	ulong
int	integer	long
lparam	uint	ulong
lpbyte	ref integer	ref long
lpdword	ref uint	ref ulong
lpfiletime	ref time	ref time
lpint	ref integer	ref long
lpstr,lptstr	ref string	ref string
lpvoid	ref <structure>	ref <structure>
pbyte	ref integer[#]	ref long[#]
short	integer	integer
structure	ref <structure>	ref <structure>
uint	uint	ulong
void	SUBROUTINE	SUBROUTINE
word	uint	uint
wparam	uint	ulong
callback*	not supported	not supported