Retrieve traytip text using TTM_GetText message

[RijulAhuja]

I was looking at some old threads and found this TTM_GetText message which can be used to retrieve tooltip / traytip text.
I attempted to try and solve some of it, but I'm missing something, could anybody tell ?

Code: Select all

TrayTip, % Title:="Title", % Text:="Text"
DetectHiddenWindows, On
wParam:=StrLen(Text)+1
cbSize:=4+4+A_PtrSize+(A_Is64bitOS ? 8 : 4)+16+A_PtrSize+( wParam * (A_IsUnicode) ? 2 : 1 )
FileGetVersion, _WIN32_IE, %A_ProgramFiles%\Internet Explorer\iexplore.exe
If (floor(_WIN32_IE)>=3)
	cbSize+=A_Is64bitOS ? 8 : 4
VarSetCapacity(lParam,cbSize,0)
NumPut(cbSize,lParam,0,"UInt")
NumPut(uFlags:=0,lParam,4,"UInt")
NumPut(hwnd:=A_ScriptHwnd,lParam,8,"Ptr")
NumPut(uId:=0,lParam,8+A_PtrSize,A_Is64bitOS ? "UInt64" : "UInt")
NumPut(Rect_Left:=0,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+4,"Int")
NumPut(Rect_Top:=0,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+4+4,"Int")
NumPut(Rect_Right:=A_ScreenWidth,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+4+4+4,"Int")
NumPut(Rect_Bottom:=A_ScreenHeight,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+4+4+4+4,"Int")
NumPut(hInstance:=0,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+16,"Ptr")
NumPut(lpszText:=0,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+16+A_PtrSize,"UInt")
If (floor(_WIN32_IE)>=3)
	NumPut(lParam_struct:=0,lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+16+A_PtrSize+(wParam * ( (A_IsUnicode) ? 2 : 1 )),A_Is64bitOS ? "UInt64" : "UInt")
SendMessage,TTM_GETTEXT:=0x0400+56,wParam,lParam, , ahk_id %A_ScriptHwnd%
Text2:=""
Loop, % wParam-1
	Text2.=NumGet(lParam,8+A_PtrSize+(A_Is64bitOS ? 8 : 4)+16+A_PtrSize+A_Index-1,"Char")
MsgBox % Text2
return

[Leefme]

Please review my replies in the following thread,
http://www.autohotkey.com/board/topic/5 ... ip-window/

[RijulAhuja]

Thank you, but I was merely using this to increase my understanding of APIs.
Would it be possible for you to take a look at the code above ?
EDIT : Oh, and sorry for not noticing earlier, but welcome to the forum.

[Leefme]

Thanks for the welcome.
I don't understand your code, so I can't help with it.

[RiseUp]

I was looking at some old threads and found this TTM_GetText message which can be used to retrieve tooltip / traytip text.
I attempted to try and solve some of it, but I'm missing something, could anybody tell ?

<<code snipped>>

What kind of error do you get?

[RijulAhuja]

The text, it's incorrect. No particular error. Just shows up as 0000

[just me]

• Code: Select all

  typedef struct {                          x86      x64
    UINT      cbSize;        4                4        4
    UINT      uFlags;        4                4        4
    HWND      hwnd;          A_PtrSize        4        8
    UINT_PTR  uId;           A_PtrSize        4        8
    RECT      rect;          16              16       16
    HINSTANCE hinst;         A_PtrSize        4        8
    LPTSTR    lpszText;      A_PtrSize        4        8
    LPARAM    lParam;        A_PtrSize        4        8
    void      *lpReserved;   A_PtrSize        4        8
  } TOOLINFO, *PTOOLINFO, *LPTOOLINFO;      ---      ---
  
                                             48       72
  

• lpszText is a pointer to a buffer that receives the text.
• TTM_GETTEXT
  lparam
  Pointer to a TOOLINFO structure. Set the cbSize member of this structure to sizeof(TOOLINFO) before sending this message. Set the hwnd anduId members to identify the tool for which to retrieve information. Allocate a buffer of size specified by wParam. Set the lpszText member to point to the buffer to receive the tool text

[RijulAhuja]

Some questions regarding this

Spoiler

1. UINT_PTR is defined as

Code: Select all

#if defined(_WIN64)
 typedef unsigned __int64 UINT_PTR;
#else
 typedef unsigned int UINT_PTR;
#endif

Do I need to check if my system is 64 bit or the running exe ?
2. How did you determine the size of lpszText ? It would depend on whether the exe is Unicode, or ANSI.
3. How are you sure that we would need to allocate space for members *lpReserved and lParam, without checking the conditions ?
4. Do we have to align the structure ?
5. Do I need to plug in all zero values manually to members by means of NumPut, or an initial FillByte:=0 within the VarSetCapacity would do ?

Thank you for your help.

EDIT : I have create a table for this structure, if you could just identify the mistake(s) in it, that would be great.

Spoiler

[just me]

1. You need to check whether the application is 64-bit (i.e. A_PtrSize =8).
2. lpszText is a pointer to a buffer, so its size is A_PtrSize.
3. *lpReserved and lParam are pointers/pointer-sized, too.
4. Alignment is not needed as far as the lenght is a multiple of the largest member.
5. VarSetCapacity(Var, Lenght, 0) will initialize Var with binary zeroes.

Table: The offsets of lParam and *lpReserved do not depend on wParam.

[RijulAhuja]

I believe I understood what you mean, but the code still doesn't work.

Spoiler

Code: Select all

Title:="Title"
Text:="Related   text"
wParam:=StrLen(Text)+1						;total length, including null char
cbSize:= 4									;UINT      cbSize;        4                4        4
		+4									;UINT      uFlags;        4                4        4
		+A_PtrSize							;HWND      hwnd;          A_PtrSize        4        8
		+A_PtrSize							;UINT_PTR  uId;           A_PtrSize        4        8
		+16									;RECT      rect;          16              16       16
		+A_PtrSize							;HINSTANCE hinst;         A_PtrSize        4        8
		+A_PtrSize							;LPTSTR    lpszText;      A_PtrSize        4        8
		+A_PtrSize							;LPARAM    lParam;        A_PtrSize        4        8
		+A_PtrSize							;void      *lpReserved;   A_PtrSize        4        8
VarSetCapacity(TOOLINFO,cbSize,0)
NumPut(cbSize,TOOLINFO,0,"UInt")
NumPut(uFlags:=0,TOOLINFO,4,"UInt")
NumPut(HWND:=A_ScriptHwnd,TOOLINFO,8,"Ptr")
NumPut(uId:=0,TOOLINFO,8+A_PtrSize,A_PtrSize = 8 ? "UInt64" : "UInt")
NumPut(rect_left:=0,TOOLINFO,8+2*A_PtrSize,"Int")
NumPut(rect_top:=0,TOOLINFO,12+2*A_PtrSize,"Int")
NumPut(rect_right:=A_ScreenWidth,TOOLINFO,16+2*A_PtrSize,"Int")
NumPut(rect_bottom:=A_ScreenHeight,TOOLINFO,20+2*A_PtrSize,"Int")
NumPut(hinst:=0,TOOLINFO,24+2*A_PtrSize,"Ptr")
VarSetCapacity(Text2,wParam*(A_IsUnicode ? 2 : 1),0)
Text2:="Unrelated text"
NumPut(lpszText:=&Text2,TOOLINFO,24+3*A_PtrSize,"Ptr")
NumPut(lParam_TOOLINFO:=0,TOOLINFO,24+4*A_PtrSize,"Ptr")
NumPut(lpReserved:=0,TOOLINFO,24+5*A_PtrSize,"Ptr")
lParam:=&TOOLINFO
TrayTip, % Title, % Text
DetectHiddenWindows, On
SendMessage,TTM_GETTEXT:=0x0400+56,wParam,lParam, , ahk_id %A_ScriptHwnd%
Text3:=""
Loop, % wParam-1
   Text3.=NumGet(Address+A_Index-1,0,"Char")
MsgBox % StrLen(Text) Text "`n" StrLen(Text2) Text2 "`n" StrLen(Text3)
return