hi every one I'm new here and new to windows programing how to convert from HWND to LPCTSTR I want to disply a message after I use FindWindow the handle mast be HWND and the caption must be LPCTSTR so any one know how to do this HWND Handle; Handle=FindWindow("win32padClass","[Untitled]* - win32pad"); MessageBox(hWnd,Handle,"Handle",MB_OK); thank you; .
Impossible to answer from the information given, except to say that converting a HWND to a LPCTSTR is impossible; they're completely different objects. Could you give an example, you mentioned "[Untitled]* - win32pad", what message exactly do you want to display if, say, the window handle of the first window you find with this title is 0x01234567?
hi there I'm sorry if the question is not clear let's say what you say I find a Window Handle with FindWindow/EX we know that the type of that return is HWND now, how about that I have a Window with child windows static= Caption static=class static = Handle and a edit=NULL // for the window CAPTION edit=NULL // for the window CLASS edit=NULL //for the window HANDLE // that is disabled and button=Find Window now the user write the caption and the class of the window he wants to get its handle and when he clicks the button, the found handle should be written in the edit window's handle
OK, you can convert a number into a string with sprintf. I'd probably use the format string 0x%08lx, then the resulting string would contain "0x01234567" in my example.
Hey, for security reasons we don't allow attachments for code and I would suggest you share the code in posts.
all right what ever here is the C++ code Code: // Test.cpp : Defines the entry point for the application. // #include "stdafx.h" #include <commctrl.h> #include "resource.h" #include <stdio.h> #include <string> using namespace std; int CALLBACK DlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg) { case WM_DESTROY: case WM_CLOSE: PostQuitMessage(0); break; case WM_INITDIALOG: RECT rc; GetWindowRect(hDlg, &rc); int nWidth, nHeight; nWidth = rc.right - rc.left; nHeight = rc.bottom - rc.top; int cxScreen, cyScreen; cxScreen = GetSystemMetrics(SM_CXSCREEN); cyScreen = GetSystemMetrics(SM_CYSCREEN); MoveWindow(hDlg, (cxScreen - nWidth) / 2, (cyScreen - nHeight) / 2, nWidth, nHeight, TRUE); break; case WM_COMMAND: switch (LOWORD(wParam)) { case ID_GETHWND: HWND hwnd,hEdit1,hEdit2; HWND hEdit3; hEdit1=GetDlgItem(hDlg,ID_CAPTION); hEdit2=GetDlgItem(hDlg,ID_CLASS); hEdit3=GetDlgItem(hDlg,ID_HWND); int lEdit1,lEdit2; lEdit1=SendMessage(hEdit1,WM_GETTEXTLENGTH,NULL,NULL); lEdit2=SendMessage(hEdit2,WM_GETTEXTLENGTH,NULL,NULL); char Caption[255]; char Class[255]; GetWindowText(hEdit1,Caption,GetWindowTextLength(hEdit1) + 1); GetWindowText(hEdit2,Class,GetWindowTextLength(hEdit2) + 1); hwnd=FindWindow(Class,Caption); //we find the window /*what is wrong here NOTING WORK SendMessage(hEdit3,WM_SETTEXT,(WPARAM)hwnd,NULL); SendMessage(hEdit3,WM_SETTEXT,hwnd,NULL); SetWindowText(hEdit3,(LPCTSTR)hwnd); SetWindowText(hEdit3,h); */ } break; } return 0; } int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { InitCommonControls(); DialogBoxParam(hInstance, MAKEINTRESOURCE(IDD_DIALOG), 0, DlgProc, 0); return 0; } here is the RC code Code: //Microsoft Developer Studio generated resource script. // #include "resource.h" #define APSTUDIO_READONLY_SYMBOLS ///////////////////////////////////////////////////////////////////////////// // // Generated from the TEXTINCLUDE 2 resource. // #include "afxres.h" ///////////////////////////////////////////////////////////////////////////// #undef APSTUDIO_READONLY_SYMBOLS ///////////////////////////////////////////////////////////////////////////// // Chinese (P.R.C.) resources #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS) #ifdef _WIN32 LANGUAGE LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED #pragma code_page(936) #endif //_WIN32 #ifdef APSTUDIO_INVOKED ///////////////////////////////////////////////////////////////////////////// // // TEXTINCLUDE // 1 TEXTINCLUDE DISCARDABLE BEGIN "resource.h\0" END 2 TEXTINCLUDE DISCARDABLE BEGIN "#include ""afxres.h""\r\n" "\0" END 3 TEXTINCLUDE DISCARDABLE BEGIN "\r\n" "\0" END #endif // APSTUDIO_INVOKED #endif // Chinese (P.R.C.) resources ///////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////// // English (U.S.) resources #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU) #ifdef _WIN32 LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US #pragma code_page(1252) #endif //_WIN32 ///////////////////////////////////////////////////////////////////////////// // // Dialog // IDD_DIALOG DIALOG DISCARDABLE 0, 0, 252, 42 STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU CAPTION "Find Window Handle" FONT 8, "MS Sans Serif" BEGIN LTEXT "Caption",IDC_STATIC,4,7,25,8 LTEXT "Class",IDC_STATIC,3,26,21,8 EDITTEXT ID_CAPTION,31,7,110,12,ES_AUTOHSCROLL EDITTEXT ID_CLASS,31,25,110,12,ES_AUTOHSCROLL PUSHBUTTON "Get Handle",ID_GETHWND,147,17,50,14 EDITTEXT ID_HWND,200,17,51,14,ES_AUTOHSCROLL END ///////////////////////////////////////////////////////////////////////////// // // Icon // // Icon with lowest ID value placed first to ensure application icon // remains consistent on all systems. ///////////////////////////////////////////////////////////////////////////// // // DESIGNINFO // #ifdef APSTUDIO_INVOKED GUIDELINES DESIGNINFO DISCARDABLE BEGIN IDD_DIALOG, DIALOG BEGIN RIGHTMARGIN, 251 BOTTOMMARGIN, 37 END END #endif // APSTUDIO_INVOKED ///////////////////////////////////////////////////////////////////////////// // // 24 // 1 24 DISCARDABLE "xptheme.bin" #endif // English (U.S.) resources ///////////////////////////////////////////////////////////////////////////// #ifndef APSTUDIO_INVOKED ///////////////////////////////////////////////////////////////////////////// // // Generated from the TEXTINCLUDE 3 resource. // ///////////////////////////////////////////////////////////////////////////// #endif // not APSTUDIO_INVOKED I HOPE THAT IS A LITTLE CLEAR
Code: SendMessage(hEdit3,WM_SETTEXT,(WPARAM)hwnd,NULL); SendMessage(hEdit3,WM_SETTEXT,hwnd,NULL); SetWindowText(hEdit3,(LPCTSTR)hwnd); SetWindowText(hEdit3,h); It's been a while since I've done any WinAPI dialog programming so I'm not sure whether you should use SendMessage...WM_SETTEXT or SetWindowText, in fact they could be equivalent. However it doesn't work because hwnd is a window handle, not a text string. Any functions that relate to text MUST take a char*. So if you want to display the window handle itself you must convert the handle to text, which you can do with sprintf, which works exactly the same way as printf except that there is an additional parameter at the start that tells sprintf where to print the text. For example Code: char str[128]; sprintf(str,"Window handle is 0x%08x",hwnd);
thank you I use these tree lines Code: char szBuffer[256]; sprintf(szBuffer, "0x%08x", hwnd); SetWindowText(hEdit3,szBuffer);
char szBuffer[256]; sprintf(szBuffer, "0x%08x", hwnd); SetWindowText(hEdit3,szBuffer); i dont think it will work properly, you may get japanese kanji as out put try with TCHAR szBufferp[256]; (wide charecter version), next thing is find/create a function to convert from large number to TCHAR
I'm sure I used to use %x for this sort of stuff. Maybe compilers were less strict in those days. Anyway, the following definitely works (I tested this in a WM_CREATE block within the basic Windows C++ program generated by VS2005): Code: TCHAR szBuffer[256]; wsprintf(szBuffer, L"Window handle 0x%08p", hWnd); SetWindowText(hWnd,szBuffer);
