113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
#include <windows.h>
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#include "instring.h"
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typedef struct _STRING_BUFFER {
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ULONG cbBuffer;
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LPTSTR lpBuffer;
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LPTSTR lpPrompt;
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LPTSTR lpTitle;
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} STRING_BUFFER, *LPSTRING_BUFFER;
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INT_PTR CALLBACK InputStringDlgProc(HWND hDlg, WORD message, WORD wParam, LONG lParam) {
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static LPSTRING_BUFFER lpBuffer = NULL;
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USHORT cchString;
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switch (message) {
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case WM_INITDIALOG:
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// DialogBoxParam passes in pointer to buffer description.
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lpBuffer = (LPSTRING_BUFFER)lParam;
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if (lpBuffer->lpPrompt) {
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SetDlgItemText(hDlg, IDD_INPUT_STRING_PROMPT, lpBuffer->lpPrompt);
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}
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if (lpBuffer->lpTitle) {
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SetWindowText(hDlg, lpBuffer->lpTitle);
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}
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SendDlgItemMessage(hDlg,
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IDD_INPUT_STRING,
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EM_LIMITTEXT,
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(WPARAM)(lpBuffer->cbBuffer - 1), // text length, in characters (leave room for null)
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0); // not used; must be zero
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return(TRUE);
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case WM_COMMAND:
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switch (wParam) {
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case IDOK:
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// Get number of characters.
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cchString = (WORD)SendDlgItemMessage(hDlg,
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IDD_INPUT_STRING,
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EM_LINELENGTH,
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(WPARAM) 0,
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(LPARAM) 0);
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if (cchString == 0) {
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*(lpBuffer->lpBuffer) = '\0';
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EndDialog(hDlg, TRUE);
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lpBuffer->cbBuffer = 0;
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return FALSE;
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}
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// Put the number of characters into first word
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// of buffer.
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*((USHORT*)lpBuffer->lpBuffer) = cchString;
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lpBuffer->cbBuffer = cchString;
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// Get the characters.
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SendDlgItemMessage(hDlg,
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IDD_INPUT_STRING,
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EM_GETLINE,
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(WPARAM)0, // line 0
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(LPARAM)lpBuffer->lpBuffer);
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// Null-terminate the string.
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lpBuffer->lpBuffer[cchString] = 0;
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lpBuffer = NULL; // prevent reuse of buffer
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EndDialog(hDlg, 0);
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return(TRUE);
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}
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break;
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default:
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return(FALSE);
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}
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return(TRUE);
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}
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/***************************************************************************
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Name : InputString
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Purpose : Brings up a dialog requesting string input
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Parameters: hInstance = hInstance of app
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hwnd = hwnd of parent window
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lpszTitle = Dialog box title
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lpszPrompt = Text in dialog box
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lpBuffer = buffer to fill
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cchBuffer = size of buffer
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Returns : return ULONG number of characters entered (not including terminating
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NULL)
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Comment :
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***************************************************************************/
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ULONG InputString(HINSTANCE hInstance, HWND hwnd, const LPTSTR lpszTitle,
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const LPTSTR lpszPrompt, LPTSTR lpBuffer, ULONG cchBuffer) {
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STRING_BUFFER StringBuffer;
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StringBuffer.lpPrompt = lpszPrompt;
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StringBuffer.lpTitle = lpszTitle;
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StringBuffer.cbBuffer = cchBuffer;
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StringBuffer.lpBuffer = lpBuffer;
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DialogBoxParam(hInstance, (LPCTSTR)"InputString", hwnd, InputStringDlgProc,
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(LPARAM)&StringBuffer);
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return(StringBuffer.cbBuffer);
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}
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